math;)

Julia wants to simplify the term sec^2 theta-1/cot^2 theta+1 in a trigonometric identity that she is proving. Which of the following identities should use to help her? Select all that apply. (2 ANSWERS)
a. sin^2 theta+cos^2 theta=1
b. sec^2 theta-tan^2 theta=1
c. sec theta=1/cos theta
d. cot theta=1/tan theta
e. 1=csc^2 theta-cot^2 theta

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  1. d&e would be my first choices

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    posted by Steve
  2. Is it c&e? cuz that's what I think it is

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    posted by Stan

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