1.

For what value of , cos(10° + 8 ) = sin 30° ?​

Answer»

ANSWER:

COS(10°+θ)=sin30°

⇒cos(20°+θ)=cos(90°−30°)

⇒10°+θ= 60°

⇒θ=50°

Hence, the answer is 50°.



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