Double angle identity for sine:


Factorize the left side.

Pythagorean identity:


so that

Step-by-step explanation:
1 act like the decimals aren't there then put 50:1 on the outside and 6630 on the inside and divide like normal
Answer:
20 pizzas.
Step-by-step explanation:
40% = 8
1% = 8 ÷ 40 = 0.2
100% = 0.2 x 100 = 20
It would be letter. b....
Answer:
x = 3 or y = -3
Step-by-step explanation:
To find x, substitute y with a 0.
0=x-3. Minus the x on both sides and x will equal 3
To find y, substitute x with a 0.
y=0-3. 0-3 equals -3 which means that y will equal -3