Question

more healp please

Answer 1

we picking from one of these

Answer 2

Oh the half angle one for sine?

Answer 3

ye, I like this one

Answer 4

they're adding tho, not multiplying?

Answer 5

so you're using critical thinking skills to figure out the x and y values

x+y = 11/2
x-y = 7/2

Answer 6

look at that formula right to left, hun

Answer 7

we starting on the right side and we end up on the left

Answer 8

formulas always work both ways

Answer 9

Oh so
\[\frac{ 1 }{ 2 }[\sin11x+\sin7x] = \frac{ 1 }{ 2 }[\sin(9x+2x) + \sin(9x-2x)]\]

Answer 10

umm not sure about taking the 1/2 out of the inside of the sine

Answer 11

1 and 9/2?

Answer 12

OH multiply 2 on both sides
ohhhhh

Answer 13

magic

Answer 14

oh, i got it now xdd

thanks so muchhhhhhhhhhhhhhhhhhhhhhhhhhhhh <3