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MATH SOLVE
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Or an angle θ with the point (−20, −21) on its terminating side, what is the value of cosine?
4 months ago
Q:
Or an angle θ with the point (−20, −21) on its terminating side, what is the value of cosine?
Accepted Solution
A:
cos(θ) = -20/√((-20)^2 +(-21)^2)
.. = -20/-√841 . . . . . . . . . . . . . . . . . θ is a 4th-quadrant angle, so cos(θ) > 0
.. = 20/29
The value of the cosine is 20/29.