Answer :

We need to find the value of:


Let us simplify the trigonometric function.


We can write as:



Similarly,




Since, lies on IV Quadrant and cosine is positive in IV Quadrant.



And since, lies on IV Quadrant and sine is negative in IV Quadrant.





Using property of inverse trigonometry,


sin-1(sin A) = A and cos-1(cos A) = A



=0

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