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Published byTrevor Knight Modified over 8 years ago
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4.4 Trigonometric Functions of Any Angle
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Ex.Find the sine, cosine, and tangent of if (-3,4) is a point on the terminal side of. (-3,4) -3 4 ? =5
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Ex.Given and, find and. First, determine what quadrant theta lies in. Where is tan (-) and cos (+)? IV -5 4 = ?
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Reference Angles A reference angle is the acute angle formed by the terminal side of and the horizontal axis. Find the reference angles of 300 o, 2.3, and –135 o. 300 o 60 o 1.57 3.14 2.3 rad 3.14 -2.30.84 -135 o 45 o
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Evaluate the following. 240 o 60 o ref. angle 2 tan (-210 o ) 30 o ref. angle 1 2 45 o ref. angle 1
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Find the cosine and tangent of theta if….. and 1 3 ? =
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