# 7-3 - 7­3.notebook 7­3 Sine(sin θ and Cosine(cos θ...

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Unformatted text preview: 7­3.notebook November 18, 2010 7­3 Sine (sin θ) and Cosine (cos θ) Functions. P(x,y) Given a unit circle: x2 + y2 = r2 sin θ = y/r cos θ = x/r r θ Mar 7­8:02 AM Ex. If the terminal ray of an angle θ in standard position passes through (­3, 2), find sin θ and cos θ. Ex. If θ is a fourth quadrant angle and sin θ = ­5/13, find cos θ. Mar 7­8:12 AM 1 7­3.notebook November 18, 2010 sin θ + cos θ ­ sin θ + cos θ + sin θ ­ cos θ ­ sin θ ­ cos θ + p.271 1­6 p.273 21­28 Mar 7­8:16 AM unit circle x2 + y2 = 1 (0,1) (­1,0) (1,0) (0,­1) cos θ = x sin θ = y Mar 7­8:21 AM . 2 7­3.notebook November 18, 2010 Evaluate the following: sin 900 sin 4500 cos (­π) cos (π/2) sin (­3π/2) cos 8100 Mar 7­8:27 AM Solve the following: sin θ = 1 cos θ = 0 sin θ = ­1 cos θ = ­1 p. 272 1­20 Mar 7­8:30 AM 3 ...
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## This note was uploaded on 04/22/2011 for the course MATH 212 taught by Professor Owens during the Winter '07 term at Grand Valley State.

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