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Precalc 5.2 blank notes.notebook 5.2 Verifying Trig. Identities Things to try when proving Trig. identities ­ work with one side of the equation at a time (usually the more complicated side) ­ Look for opportunities to factor an expression, add fractions, create a monomial denominator ­Look for identities to substitute in. Look at which functions are in the final expression to help decide which identity. ­ If the above doesn't help, try putting everything in terms of sine and cosine. ­ Always try something, see where it goes as there are many answers. 1 Precalc 5.2 blank notes.notebook Example Verify the identity. 2