Question

I don't know where to start with this problem. Not asking for it to be solved. sin(theta + pie/4)sec 2theta
in terms of theta alone

Answer 1

woah

Answer 2

Your sin(theta + Pi/4) immediately brings to mind the sum formula
\[\sin(a+b)=\sin a \cos b + \cos a \sin b.\]

Try that, using a =theta and b = Pi/4.

Answer 3

I'll be back later.

Answer 4

ok thank u, will try that...

Answer 5

Thanks math male, that was really helpful. \[\sqrt{2}/2(\cos \theta - \sin \theta)\]