Please Help!!
If x = 7 sin θ, write the expression θ/2 − sin 2θ/4 in terms of just x. (Simplify the double angle using a double-angle identity.)

Question

Please Help!!
If x = 7 sin θ, write the expression θ/2 − sin 2θ/4 in terms of just x. (Simplify the double angle using a double-angle identity.)

freckles · Answer

did you make sure you put all the ( ) in the right place?

freckles · Answer

see my post on your previous question

anonymous · Answer

I did! I did! it was wrong....

anonymous · Answer

i got it
we did the whole thing wrong

freckles · Answer

I don't see how we did

freckles · Answer

unless again you didn't mean $$\frac{\theta}{2}-\frac{\sin(2 \theta)}{4}$$

freckles · Answer

did you mean $$\frac{\theta}{2}-\sin(\frac{2 \theta}{4})?$$

anonymous · Answer

yes but the way i inserted the info into this problem was wrong