Isolate θ

cos 2θ = cos y cos x

I have no clue where to start, some help would be great.

Nvm i figured it out

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- Mar 30th 2011, 08:26 PMxbethxHelp to isolate θ
Isolate θ

cos 2θ = cos y cos x

I have no clue where to start, some help would be great.

Nvm i figured it out - Mar 30th 2011, 08:30 PMpickslides
Take inverse $\displaystyle \cos $ of both sides then divide by 2.

What do you get?