Y = SiNx + 1 / 2-sinx range

Y = SiNx + 1 / 2-sinx range

y=-(sinx+1)/(sinx-2)
=-(sinx-2+3)/(sinx-2)
=-[(sinx-2)/(sinx-2)+3/(sinx-2)]
=-1-3/(sinx-2)
-1

The range of y = (sinx-1) / (SiNx + 1)

From the title,
y=(sinx-1)/(sinx+1)
=(sinx+1-2)/(sinx+1)
=1-2/(sinx+1)
Because, SiNx ∈ [- 1,1]
So, SiNx + 1 ∈ [0,2]
So, 1 / (SiNx + 1) ∈ [1 / 2, + ∞)
So, y = 1-2 / (SiNx + 1) ∈ (- ∞, 0]

What is the range of y = SiNx + √ 1 + cos ^ 2x

y=sinx+√[2-(sinx)^2]
Let SiNx = t
-1=0
Range [0,2]

2.25 (5 / 9 + 25 / 21 × 7 / 15)

7 / 9 of 3.5 △ 125%
=7/2x9/7÷5/4
=9/2x4/5
=9/10
2.25 ÷ (5 / 9 + 25 / 21 × 7 / 15)
=2.25÷（5/9+5/9）
=9/4÷10/9
=81/40
If you don't understand this question, you can ask,

If a book is priced at 15 yuan, you can get 50% after it is sold. If you sell it at a 20% discount, you can make a profit______ Yuan

15 (1 + 50%) = 15 (150%), = 10 (yuan); 15 × 80% - 10 = 12-10, = 2 (yuan); a: it can make a profit of 2 yuan

English numeral words from 1 to 9

1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine

The ratio of X to y is 1.5:2.7; the ratio of y to Z is 15 / 4:20 / 7

x:y=15:27=5:9
y:z=15/4*（7/20）=21:16
If the least common multiple of 9 and 21 is 63, then
x:y=35：63
y:z=63:48
x:y:z=35:63:48

Is there any grammatical error in the following English sentence
now I wanna tell u guys that I've got a english name it's

Wanna is a colloquial usage, usually not in writing

This year's 2012 Olympic Games were held in London, England, and the last 2008 Olympic Games were held in Beijing. These two years are just leap years. If the Olympic Games are held every four years, then the years for holding the Olympic Games in the future will be leap years______ (judge right or wrong)

For example, in 2100, the Olympic Games will be held in 2100 The year of 1002100 is not a leap year

What's minus one third plus three

Minus one third plus three
=-1/3+3/3+2
=2+2/3
=Two and two thirds