SOLUTION: Tan^4(k)-sec^4(k)=1-sec^2(k)

Question 815665: Tan^4(k)-sec^4(k)=1-sec^2(k)
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!
Please include instructions with your problem. What are you/we supposed to do with this equation? Please re-post your question with the instructions.

P.S.

If the problem is to solve for k or to prove the identity, then here are some steps to try:
1. Factor the left side as a difference of squares.
2. Use the identity to replace the tan^2's with
If the problem is to prove the identity, then I think the right side should be , not what you posted.

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