Question

prove the sum about trigonometry​

Answer 1

Answer: let angle theta be a

cosec(90-a)=sec a

sin(90-a)=cos a

[seca-cosa] let it be equation 1

tan a +cot a =2cosec 2a let this be equation 2

1 x 2 = 2 cosec 2a x seca-cosa

sec^2 a/sin a-cosec a x cos a

taking cosec a common

cosec a (sec^2 a - 1)=coseca x tan a x cos a =1