If sin3A = cos(A - 26°), then A _____________ where 3A is an acute angle.
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Correct answer: B
Explanation
The correcta answer is option 2 i.e. 29.
Given that, sin3A = cos(A - 26°)
When sinx = cosy, then the angles x and y are complimentary to each other, i.e., x + y = 90°.
According to the given question,
⇒ 3A + A - 26° = 90°
⇒ 4A = 116°
⇒ A = 29°