Question

If sin(A + B) = 1 and cos(A-B)=1/2, then
what is the measure of angle A ?
(A) 15°
(C) 60°
(B) 30°
(D) 75°​

Answer 1

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Answer. putting the value of A in (ii),we get... hence the value of A and B are 45°and 15° respectively

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