Question

1/sec theta+tantheta=1-sin theta/cos theta​

Answer 1

proof :-

lhs=1/(seca+tana)

=(seca-tana)/(sec^2 a-tan^2).....multiplying&dividing by (seca-tana)

=(seca-tana) /1

=1/cosa - sina/cosa

=(1-sina)/cosa

hence proved