Hello, I am working on #1c of Problem Set 2 and I am having some trouble evaluating sin, cos, and sec from the fact that tan(theta)=5. I admit I am pretty rusty with my precalc and unit circle, but wouldn't tan(theta)=5 be the same as sin(theta)/cos(theta)=5/1? From here, I am missing where sin(theta) would be 5/sqrt(26). Thank you for your time in helping me to better understand this.

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anonymous · Answer

Wow, nevermind that! I am pretty dumb. If you use a right triangle setup, you can find each side (5,1, and sqrt(26) from pythagorean theorem) and then find sin, cos, and sec. Sorry if I wasted anyone's time and hope you all are enjoying your Friday night.