cos 24 + cos 55 + cos 125 + cos 204 + cos 300
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ur question is not completed , but I know the question so this is your solution
Lhs =cos 24+cos 55+cos 125+cos 204+cos 300
= cos 24 +cos 55 +cos (180-55)+cos (180-24)+cos(270+30)
= cos 24 +cos 55-cos 55-cos24+sin30
=sin 30
=1/2
=rhs
Lhs =cos 24+cos 55+cos 125+cos 204+cos 300
= cos 24 +cos 55 +cos (180-55)+cos (180-24)+cos(270+30)
= cos 24 +cos 55-cos 55-cos24+sin30
=sin 30
=1/2
=rhs
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