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  4. The expression 3[ sin 4((3 π/2)-α)+ sin 4(3 π+α)]-2[ sin 6((π/2)+α)+ sin 6(5 π-α)] is equal to

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Q. The expression $3\left[\sin ^4\left(\frac{3 \pi}{2}-\alpha\right)+\sin ^4(3 \pi+\alpha)\right]-2\left[\sin ^6\left(\frac{\pi}{2}+\alpha\right)+\sin ^6(5 \pi-\alpha)\right]$ is equal to

Continuity and Differentiability

Solution:

Correct answer is (b) 1