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

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Question 815665: Tan^4(k)-sec^4(k)=1-sec^2(k)
Answer by jsmallt9(3758) About Me  (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 tan%5E2%28k%29+%2B+1+=+sec%5E2%28k%29 to replace the tan^2's with sec%5E2%28k%29-1
  • If the problem is to prove the identity, then I think the right side should be 1-2sec%5E2%28k%29, not what you posted.