Question

solve the problem plz

Answer 1

hey friend here is your answer

As we know,

sin(90°-α) = cosα

∴sin30° = sin(90°-60°)

            =cos60°

∵cos(40°+x) = sin30°

⇒cos(40°+x) = cos60°

⇒40°+x = 60°

⇒x = 20°

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