Prove: Tan^2 - sin^2 = sin^4*Sec^4

  • Thread starter Miike012
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  • #1
Miike012
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Homework Statement


Prove:
Tan^2 - sin^2 = sin^4*Sec^4


This one I am having trouble with... My thought is that I need to make a fraction on the lift side some how ... then cross multiply then some how remove the denominator...?
Can some one please give me a hint.. thank you.

The Attempt at a Solution



Tan^2 - sin^2
.
.
= sin^2/cos^2 - sin^2

=sin^2/cos^2 - sin^4/sin^2
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Hi Miike012! :smile:

(try using the X2 icon just above the Reply box :wink:)
Tan^2 - sin^2
.
.
= sin^2/cos^2 - sin^2

Instead, try = tan2 - tan2cos2 :smile:
 
  • #3
Miike012
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I actually wrote down the probl. wrong....
It is

Tan^2 - sin^2 = sin^4*Sec^2
I figured it out though.
 

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