The double angle formula for the sine is

The right hand side is exactly your expression, where 
So, rewriting the expression from right to left, we have

Answer:

Step-by-step explanation:


Answer:
4
Step-by-step explanation:
devide 144 by 9
get 16
The base squared is 16
find the root of 16
get 4
4 is your awnser
Answer:
I believe it is 3
Step-by-step explanation: