The approximate value of cos theta in the quadrant indicated is 0.4232
Trigonometry expressions
Given the expression below;
sin theta = -0.906
Determine the value of theta
sin theta = -0.906
theta = arcsin(-0.906)
theta = -64.95 degrees
In the 4th quadrant;
theta = 360 - 64.95
theta = 295.04 degrees
Determine the value of cosine theta
Cos theta = cos 295.04
cos theta = 0.4232
Hence the approximate value of cos theta in the quadrant indicated is 0.4232
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