A tenth of a kilogram is a fraction of a gram

A tenth of a kilogram is a fraction of a gram

10000 g per 100

How many kilograms is a gram?

1 kg = 1000 g, so 1 g = 1 / 1000 g

The key is the simplest fraction, which is the summation of the simplest fractions

1/16+7/8
3/16+3/4
5/16+5/8
7/16+1/2
9/16+3/8
11/16+1/4
13/16+1/8

Elementary school mathematics online solution Ji fraction plus a few points is equal to 15 / 16, if the simplest fraction

7/8+1/16
3/4+3/16
5/8+5/16
Too much

Calculation: cos 275 ° + cos 215 ° + cos 75 ° cos 15 °

cos75°=cos（45°+30°）=cos45°cos30°-sin45°sin30°=
6-
Two
4．
cos15°=cos（45°-30°）=cos45°cos30°+sin45°sin30°=
6+
Two
4．
cos275°+cos215°+cos75°cos15°=cos275°+sin275°+
6-
Two
4•
6+
Two
4=1+1
4=5
4．

What do you find by comparing the sizes of COS 30, cos 45, and COS 60 On the basis of the above, for any acute angle α, β, when α < β, is there cos α > cos β? It needs speed

cos30°>cos45°>cos60°
The cosine of the acute angle decreases as the angle increases
For any acute angle α, β, when α < β, there is cos α > cos β!

Find the values of cos30, cos60 and cos45, The answer is cos30 = sin (90-30) = sin60 = radical 3 / 2 cos60=sin(90-60)=sin30=1/2 Cos45 = sin (90-45) = sin45 = radical 2 / 2 The answer book has, but I don't know how to get the final result. Why is sin60 equal to the root of 3 / 2, please kindly people can do the answer for me one by one

In a right triangle, the opposite side of 30 degrees is half of the hypotenuse. If the right angle of 30 degrees is 1, then the hypotenuse is 2
So cos30 = sin (90-30) = sin60 = radical 3 / 2
cos60=sin(90-60)=sin30=1/2
When you learn the induction formula of trigonometric function in high school, you will understand the specific reason why cos30 = sin (90-30)
Before you remember
Right angled triangles of the same degree

Is cos (60 ° - 30 °) = cos 60 ° - cos 30 °? What is cos (90 ° - a) equal to and why

cos(60°—30°)=cos30°=√3/2 cos60°—cos30=1/2-√3/2 ∵√3/2≠1/2-√3/2 ∴cos(60°—30°)≠cos60°—cos30° cos(90°—a)=sina

What is sin 75 + sin 15?

sin75+sin15=2sin(90/2)cos(60/2)=2*√2/2*√3/2=√6/2

Sin15 ° sin30 ° sin75 ° is equal to?

sin15sin30sin75
=(1/2)sin15sin(90-15)
=(1/2)sin15cos15
=(1/2)*[(1/2)*2sin15cos15]
=(1/4)sin30
=1/8