Q6 of 123 Page 9

Mark the Correct alternative in the following:

The value of is


Given expression is


Now




Multiplying and dividing the whole expression with




[using sin 2x = 2 sin x cos x formula]



[using cos 3x = 4cos3x – 3 cos x formula]




[using ]



= 0


Therefore


The answer is option A.

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