Homework Soursetan u sec u cos u csc u Prove the identity tan u sec u cos u
tan u/ sec u- cos u= csc u
Prove the identity
tan u/ sec u- cos u= csc u
Prove the identity
Prove the identity
Solution
left hand side
tan u/ (sec u- cos u)
=(sin u/cos u)/(1/cos u - cos u)
= sin u/(1 - cos2u)
= sin u / sin2u
= 1/sin u
= csc u = right hand side
