Question

show that sin 33° + cos 63° = cos 3°​

Answer 1

Answer:

pl see proof below

Step-by-step explanation:

sin33°=sin(30°+3°) =sin30°.cos3°+cos30°.sin3°

=1/2.cos3°+√3/2.sin3°

cos63°=Cos(60°+3°) =cos60°.cos3°-sin60°.sin3°

=1/2.cos3°-√3/2sin3°

LHS=sin33°+cos63°

=cos3°

=RHS

PROVED.

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