Asked by kem
If cos 20=m determine the values of the following in terms of m. (a)sin 250 (b)sin 20 thanks
Answers
Answered by
Steve
Reduce things to reference angles in Quadrant I:
sin 250 = sin(270-20) = -cos 20 = -m
since sin^2+cos^2 = 1,
sin 20 = √(1-m^2)
sin 250 = sin(270-20) = -cos 20 = -m
since sin^2+cos^2 = 1,
sin 20 = √(1-m^2)
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