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:
64x²y²
Step-by-step explanation:
Use the great smart calculator
hope it helpz uuuuuuu
Answer:
10 subtracted from the product of 8 and 'a' is equal to the product of 6 and 'a'
Step-by-step explanation:
Answer:
is 7.5 hope i help
Step-by-step explanation:
u put them in order from least to greatest
1 , 4, 6, 9, 15, 19
then take out one number from each side after that u are left with 6 and 9 and whats in the middle of does two numbers ? well u just estimate and it might be 7.5
The answer is : X=-7/3-2/3y