Question

5. If cos (40° + x) = sin 30°, then x is equal to
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Answer 1

Answer:

Mark as brainliest answer.

Step-by-step explanation:

→ sin 30° = 1/2

→ A.T.Q

→ cos(40° + x) = sin 30°

→ cos (40° + x) = 1/2

→ cos(40° + 5°) = 1/2

→ cos 45° = 1/2

→ we know cos 45° = 1/2

→ 1/2 = 1/2

→ lhs = rhs

→ Hence value of x is 5.