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If cos(α + β) = 0, then sin(5α + 6β) is equal to (1) sin α (2) -cos β (3) sin β (4) cos α

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If cos(α + β) = 0, then sin(5α + 6β) is equal to

(1) sin α 

(2) -cos β 

(3) sin β

(4) cos α

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Correct option (1) sin α 

Explanation :

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