SOLUTION: tan 2 theta � tan 3 theta =1.....then cos 5 theta =?

SOLUTION: tan 2 theta � tan 3 theta =1.....then cos 5 theta =?

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Question 1086576: tan 2 theta � tan 3 theta =1.....then cos 5 theta =?
Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
.

If   = 1   then

     =  - ,

    which implies   = ,

    and then   = 0.

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