Answer:
sin²x
Step-by-step explanation:
we have
(1 − cos x)(1 + cos x)=1-cos²x
Remember that
sin²x+cos²x=1 ------> i-cos²x=sin²x
therefore
(1 − cos x)(1 + cos x)=sin²x
Answer:
Step-by-step explanation:
x + y = 25 ...........................(1)
{4x + 2y =64} / 2 divide the equation by 2
2x + y = 32 ........................(3)
Step Two
subtract (1) from (3)
2x + y = 32
x + y = 25
x = 7
Therefore from equation 1 we get x + y = 25
but x = 7
7 + y = 25 Subtract 7 from both sides.
y = 25 - 7
y = 18
Check
4*x + 2*y = 64
4*7 + 2*18 =? 64
28 + 36 = ? 64
64 = 64
The checks out to be the right answer.
Answer:
20 servings / 4 servings = 5 times as much.
Multiply the amount needed for 4 servings by 5:
2/3 cups x 5 = 10/3 = 3 1/3 cups total
Step-by-step explanation:
Answer:
The answer is x = 2
Step-by-step explanation:
6x - 7x + 2 = 0
-x + 2 = 0
-x = -2
x = 2
Answer:
9
Step-by-step explanation:
Given: Subtract 9 from 10. Multiply this difference by 3, square this product.
Now, lets simplify it.
![[(10-9)\times 3]^{2}](https://tex.z-dn.net/?f=%5B%2810-9%29%5Ctimes%203%5D%5E%7B2%7D)
Using PEDMAS rule to solve it
First working on Parenthesis
= ![[(1)\times 3]^{2}](https://tex.z-dn.net/?f=%5B%281%29%5Ctimes%203%5D%5E%7B2%7D)
Opening the parenthesis
= ![[1\times 3]^{2}](https://tex.z-dn.net/?f=%5B1%5Ctimes%203%5D%5E%7B2%7D)
= ![[3]^{2}](https://tex.z-dn.net/?f=%5B3%5D%5E%7B2%7D)
= 
∴ Answer is 9.
