Question 169039
Use Fundamental Identities and or the Complementary Angle Therom to find the exact value of the expression. If tan^2 Θ=9, find the exact value of sec^2 Θ.
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sec^2 = tan^2 + 1 (Is that a fundamental identity?)  If not, use:
sin^2 + cos^2 = 1  and divide thru by cos^2.
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sec^2 = 10