1.

Cos square A+1/1+cot square A=1

Answer»

Pretty EASY..

1 + Tan2A = 1 + Sin2A/Cos2A

= (Cos2A + Sin2A)/ Cos2A

= 1/Cos2A (As cos2A + sin2A = 1)

= Sec2A

Similarly, 1 + Cot2A = Cosec2A

LHS: 1 + Tan2A / 1 + Cot2a

= Sec2A/Cosec2A

=Sin2A/Cos2A

=Tan2A

=1/Cot2A

RHS: 1/Cot2A

Since LHS=RHS; HENCE PROVED!

Hope you understood! :)

hope it will help you.



Discussion

No Comment Found

Related InterviewSolutions