Express the Function as a Trigonometric Function of X $$1 + \tan ^ { 2 } x = \frac { \cos ^ { 2 } x } { 1 - \cos ^ { 2 } x }$$

Q29: Write the product as a sum

Q30: Use a sum or difference identity

Q31: Verify that each equation is an

Q32: Verify that the equation is an

Q33: Write the expression in terms of sine

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Q36: Use the fundamental identities to find

Q37: Verify that each equation is an

Q38: Verify that each equation is an

Q39: Using a sum or difference identity,