If sin x = cos(5x - 60°), then what is the value of x?
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Correct answer: B
Explanation
The correct answer is option 2 i.e. 25°.
Formula: sin x = cos(90° – x)
sin x = cos(5x – 60°)
⇒ x = 90° – (5x – 60°)
⇒ x = 90° – 5x + 60°
⇒ 6x = 150°
⇒ x = 150°/6 = 25°