sin2x=1 + cos2x 1-cos2x cos2x-1 From the next-to-last identity on the left, we get: cos π/3 =sin π/2 sin π/3 sin π/6 Top of Page The Other Trigonometric Functions The ratios and reciprocals of sine and cosine are given their own names: ...
Evaluating Trig Functions Given a point (x,y) on the unit circle, the value of the 6 trig functions are… sinθ = y cosθ = x tanθ = y/x cscθ = 1/y secθ = 1/x cotθ = x/y (reciprocal of y) (reciprocal of x) Evaluating Trig Functions When evaluating a trig function…...
Find the terminal point P(x, y) on the unit circle determined by the value of If , find the sin(t) and cos(t). If , find the sin(t) and cos(t). If , find the sin(t) and cos(t). Quotient Identities Reciprocal Identites Pythagorean Identity...
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