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3[sin^4(3π/2-alpha)+sin^4(3π+alpha)]-2[sin^6(π/2+alpha)+sin^6(5π-alpha)]=?

3[sin^4(3π/2-alpha)+sin^4(3π+alpha)]-2[sin^6(π/2+alpha)+sin^6(5π-alpha)]=?

Grade:11

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
4 years ago
Dear student

solve sin(A+B), and cos(A+B)

on simplification you get

2(sin alpha )^4 * (1+ (2*(cos alpha)^2))

Regards

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