How to find general solution for cosx=-1/2???I m not understanding why

This question was asked in Ex 3.4, 5

How to find general solution for cosx=-1/2???
I m not understanding why they are taking 180-60 and not 180 60??

shebin mohan

Oct. 5, 2017, 12:05 p.m.

Answers!

Anubhav Singh

Oct. 5, 2017, 1:08 p.m.

Look bro...we are doing 180-60 because then it will go into second quadrant...and in second quadrant cos is negative.
Best of luck

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