Q. 34.0( 1 Vote )

# If then write the value of

Answer :

Given then the value of

Hence

But as given,

This states that, 90° < x < 270°, which means x lies between 2^{nd} and 3^{rd} quadrants.

In the 2^{nd} and 3^{rd} quadrants, the cosine function is negative, so the value of

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