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Introduction to Trigonometric Identities
6. Trigonometric Identities and More Equations / Introduction to Trigonometric Identities / Problema 4
Problema 4

Determine the value(s) of the given trigonometric expression if sinx=13\(\sin\) x=\(\frac\)13.
secx−cosxcosx\(\frac{\sec x-\cos x}{\cos x}\)