Asked by Andrea

How would you show that one trigonometric expression is equal to another? I’m not exactly sure how to start.

Answers

Answered by Steve
start by using the most basic identities:
tanx=sinx/cosx
sin^2x + cos^2x = 1

by dividing by cos^2x you get

tan^2x+1 = sec^2x

divide by sin^2x and you get

1+cot^2x = csc^2x

There should be a section in your text covering trig identities. It will start out with simple ones like these and move on to more complicated ones.
Answered by Andrea
Okay, thank you Steve!
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