

InterviewSolution
Saved Bookmarks
1. |
Sec4x - sec2 x,=tan4x- tan2x |
Answer» Prove the following identitessec4x - sec2x = tan4x + tan2xSOLUTIONLHS = sec4x - sec2x= sec2x(sec2x - 1)= (tan2x + 1)(tan2x) (∵ sec2x - tan2x = 1)= tan4x + tan2x=RHSHence proved. | |