If sin A + cos A = sin A, then what is the value of cot A?
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Correct answer: D
Explanation
The correct answer is option 4 i.e. - 1.
sin A + cos A = √2 sin A
⇒ cos A = √2 sin A - sin A = sin A(√2 - 1)
⇒ cos A/sin A = √2 - 1
⇒ cot A = √2 - 1