NCERT Class 11 Mathematics Solutions: Chapter 3 – Trigonometric Functions Miscellaneous Exercise Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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The Six Trigonometric Function

1. Prove that:


L. H. S.

8. Find , if in quadrant II


Here, is in quadrant II.

i.e.. ,

So, are lies in first quadrant.

It is given that

As is in quadrant II, is negative.


So, the respective values of .