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Question

If a cos θ − b sin θ = c, then a sin θ + b cos θ =

(a) ±a2+b2+c2
(b) ±a2+ b2-c2
(c) ±c2-a2-b2
(d) None of these

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Solution

Given:

Squaring on both sides, we have





Hence, the correct option is (b).


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