How to deduce SiNx + radical 3cosx = 2Sin (x + π / 3)

How to deduce SiNx + radical 3cosx = 2Sin (x + π / 3)

sinx+√3cosx=2[(1/2)sinx+(√3/2)cosx]
=2[sinxcos(π/3)+sin(π/3)cosx]
=2sin(x+π/3)
Using the formula sin α cos β + cos α sin β = sin (α + β)

If SiNx cosx = 1 / 3, what is SiNx * cosx equal to and how to calculate

sinx-cosx=1/3
(sinx-cosx)^2=sin²x-2sinxcosx+cos²x=1-2sinxcosx=1/9
So sinxcosx = 4 / 9

What is 50 + 90 + 58 + 25-87-6 + 82

212

Feel the nature of the composition
Close contact with nature (450 words to 500 words)

Preview of the seventh Chinese lesson "magical clone" published by Jiangsu Education Press

Read the text five times and make up the new words after class
That's it. We are the preview responders: Happy McDull | Level 2 | 2010-3-23 19:42
I'd like to marry you | grade two | 2010-3-23 19:44
1. Dictation of new words:
For example, the efficiency of potato grafting bacteria is attractive
2. Mutual approval in the same seat
3. Collective feedback
4. Key correction guidance: potato yield
5. Complete the first question of "Supplementary Exercises": choose the right word
3、 Check the text reading (8 minutes recommended)
1. Choose the two most difficult natural paragraphs at the same table to check the reading situation
Read the full text silently to see what aspects of the text are introduced to us around cloning?
2. According to the question, merge and segment:
What is cloning?
Which organisms can be cloned by themselves?
Can higher animals be cloned?
Why do humans study cloning?
5、 Learn the definition of "clone" (1-6 suggestions, 10 minutes)
1. After talking about "clone" for a long time, have you made clear what clone is? There is a sentence in the article that defines clone named reading
2. Show: if you directly reproduce without sexual cell combination, it is called asexual reproduction, also known as cloning
3. This sentence is very simple for us adults. But for you, it's difficult to understand because you don't have enough physiological knowledge. So the book gives us an analogy - in this section, find it. (in other words, every animal has its own father and mother.)
4. With this analogy, it's much easier to understand the definition of cloning - in other words, if you can reproduce without the combination of mom and dad's cells, it's called cloning
5. Conversely, what is sexual reproduction?
Fill in the blanks: if you directly reproduce through the combination of sexual cells, it is called sexual reproduction, not cloning
6. "If Just... " This concept is often used in mathematics. Can you give some examples to the teacher?
7. Parody: practice defining the following words. (7-9 suggests 8 minutes)
The spirit of shower evergreen tree
Students choose a word and define it according to the sentence pattern in the text
If so, call
8. Name and read feedback
9. Back to the text, quote: what is cloning - if not, it is also called
It should be like this! Haha, the answer: chenjialu 123 | level 1 | 2010-3-23 19:55
Browse the content of the next class. Mark the key points and mark down the places you have questions or don't understand
Lectures:
Write down some notes. But don't affect the class. Some contents can be confused. Make sure to understand them first
review:
Sort out the knowledge network in your mind, find out the key points and memorize them according to the textbook. Do some questions to make sure that the knowledge you have mastered can be used flexibly. Respondent: Guan Jiacheng | grade 1 | 2010-3-24 18:15
Scientists call the process of artificial genetic manipulation of animal reproduction cloning. This biotechnology is called cloning technology. Its meaning is asexual reproduction, that is, a pure cell line formed by the division and reproduction of the same ancestor cell. The genes of each cell in the cell line are the same as each other
Cloning can also be understood as replication, copy, that is to produce the same replica from the prototype, its appearance and genetic genes are exactly the same as the prototype. Today, the meaning of "cloning" is not only "asexual reproduction", but also a group of individuals from the same ancestor, This kind of asexual progeny group from the same ancestor is also called "clonal reproduction", which is a kind of artificial induced asexual reproduction. But cloning and asexual reproduction are different. Asexual reproduction is a kind of reproduction that only one organism produces offspring without the combination of male and female germ cells, It is also called asexual reproduction. Animals such as sheep, monkeys and cattle can not reproduce asexually without manual operation. Cloning sheep Dolly is also the product of cloning, Wu Chengen, a great writer in Ming Dynasty, has a wonderful description that the monkey king often pulled out a handful of monkey hair at a critical moment and turned into a large group of monkeys. This is of course a myth, but in today's scientific terms, it means that the monkey king can quickly clone himself, The protein contained in monkey hair is the partial expression of DNA (related to its introns and exons) that guides the synthesis of this part of hair. It can be reverse transcripted, that is, it can be cloned. But in fact, our technology is not so advanced
Another cloning method is to extract gene cells from two or more individuals and combine them to form an embryo
Because cloning technology is asexual reproduction, it is not invented according to the principles of gene recombination, gene mutation and chromosome mutation
The magic clone is showing its attractive prospect to human beings!
Clonal species
1. A pure cell line formed by division and reproduction of the same ancestor cell (each gene is the same as the other)
2. First, the nucleus of the donor cell containing genetic material was transplanted into the recipient egg cell with the nucleus removed, and the two cells were fused by micro current stimulation. (same as the gene of the cell provider) respondent: Wu Long Tan Quan Qun | grade II | 2010-3-25 19:21
Words you need to know when you have a child in pinyin

If the sign [x] denotes the largest integer not greater than the rational number x, and (y) denotes the Yushu where the integer y is located by 3, the formula calculates the value of [- 3 × 7] - (14)

[- 3 × 7] denotes the largest integer not exceeding - 21, which is - 21
The remainder of 14 divided by 3 is 2
So: [- 3 × 7] - (14) = - 21-2 = - 23

4.75 × 99 + 4.75 =? 2.73 × 99 =? Need recursive equation for simple calculation!

4.75×99+4.75
=4.75×99+4.75×1
=4.75×(99+1)
=4.75×100
=475
2.73×99
=2.73×(100-1)
=2.73×100-2.73×1
=273-2.73
=270.27

Shanghai Science and Technology Press and Guangdong education press after class exercises answer page 6 who will

If you don't ask a good question, just ask the question

For a commodity, first reduce the price by 1 / 8, then increase the price by 1 / 8, the current price is higher than the original price. Is it right or wrong?

It must be wrong
The original price of a piece of clothing is 64 yuan, first drop 1 / 8 = 64 - 64 * 1 / 8 = 56 yuan
Plus 1 / 8 = 56 + 56 * 1 / 8 = 63 yuan, it is obvious that the price of people is lower than that of raw materials

If the domain of y = f (x) is [- 3,3], what is the domain of y = f (x2-1)

According to the meaning of the title:
-3 ≤ x ^ 2-1 ≤ 3 - 2 ≤ x ^ 2 ≤ 4 for any x, x ^ 2 ≥ - 2, x ^ 2 ≤ 4 = > - 2 ≤ x ≤ 2
So the domain of y = f (x2-1) is: [- 2,2]