show that sin 33° + cos 63° = cos 3°
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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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