## College Trigonometry |

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2cos 2ktt 2sin absolute value airspeed alternate interior angles amplitude answer bearing circle centered complex numbers cos2 cos2a cos2x cosine curve cot 9 csc 9 denominator Divide both sides domain of f drawing equal equation equivalent f is one-to-one f o g)(x factors gives groundspeed horizontal line test hypotenuse Identities implies interval inverse tangent law of cosines law of sines logax logay Multiply both sides Passes HLT period of 2tt phase shift Plug polar axis polar coordinates polar form Problems Pythagorean theorem quadratic formula radians radius real numbers reciprocal reference angle right side right triangle sec 9 sides to obtain sin2 sin2x sine and cosine sine curve sketch solutions in Q's Solving square root subtracting symmetry trigonometric undefined unit circle vector zero