4 Important Trigonometric Limit Practice Problems for IIT

Riya Vishwakarma

9 months ago

sir in the 3rd sum there is a mistake with cosx - cos (a+2x) ...it should be cosa - cos (a+2x) right? and the final and would be 4tan(a+x)seca right??

Ashish Bajpai

9 months ago

why ? I see no issue

Riya Vishwakarma

9 months ago

sir becoz in the question it's tan(a) so acc to ur formula tanA - tanB = sin(A-B)/cosA.cosB