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April 20, 2015

April 20, 2015

Posted by **Maria** on Monday, February 20, 2012 at 9:22pm.

sec(theta)= 1/ sqrt(1-x^2)

cot(theta)= sqrt(1-x^2)/x

What are these equations used for in real life matters or in regards to calculus?

Can't seem to find the answer anywhere :/

- Pre-Calculus/Trivia -
**Steve**, Tuesday, February 21, 2012 at 11:35amIf x = sin(theta), these equations are identities, expressing other trig functions in terms of sin

hey arise from the identity sin^2(theta) + cos^2(theta) = 1

As for real life and calculus, get familiar with the trig functions, and by the time you have mastered the techniques, you will have discovered how they can be used.

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