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∫√(cos x – cos3x)dx for x ∈ [–π/2, π/2] is equal to……. 

(a) – (1/3) 

(b) – (1/4) 

(c) – (2/3) 

(d) + (4/3)

1 Answer

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Best answer

The correct option (d) + (4/3)  

Explanation:

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