LordVictorius
Prove that 1+sec^2x*sin^2x=sec^2x



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geerky42
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Remember, \(\sec^2x = \dfrac{1}{\cos^2 x}\)

LordVictorius
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How does that help me?

geerky42
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Replace it then simplify. You will see what I mean.

geerky42
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in 1+sec^2x*sin^2x, of course.

LordVictorius
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I got it, sorry for not reporting back to you.