Verifying Trig Identities

Hard Examples

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1) Use a cofunction identity


2) Use a pythagorean identity


3) Verify
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            1) Change to sines and cosines



            2) Find common denominators




            3) Add fractions


            4) Factor out a sin x


            5) Cancel




            6) Change to sines and cosines


            7) Multiply


            8) Verify
Now try this one on your own!
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You can find the solution in the Answers section under Examples.