Question

please solve this!
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Answer 1

Answer:

We know that sin A=cos(90°-A)

cos(40°+x)=sin 30°

cos(40°+x)=cos(90°-30°)

40°+x=90°-30•

40°+x=60°

x=60°-40°

x=20°

=》The value of x is 20°.

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Answer 2

Answer:

cos(40°+x)= sin30°

cos(40°+x)= cos(90°-30°)

40°+x = 60°

x=20°