Trigonometry -- Test 2 Review

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Hi professor Simon! Great review. I just want to point out that on the last problem, dealing with harmonic motion, for part (d), we can do better than punching the equation into a calculator since we're dealing with a special angle.

[I know you already know this because your math skills are far more advanced than mine]

Getting an exact answer in that case might be better... or just more fun. So since we have -3cos(5π/4), using our knowledge of special angles and the range of cosine, we get (3√2)/2, which of course equals ≈ 2.12

I'm ready for my trig exam now! But my professor is so much more fussy than you. For example, I have to reduce every point on my graph like, 17/15 instead of 34/30. Huge pain in my ass, but I've got to do it.

informallyeducated