SOLUTION: Suppose that theta is an angle in standard position whose terminal side passes through the point (9, 12). Give the exact value of cos theta .

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Question 386757: Suppose that theta is an angle in standard position whose terminal side passes through the point (9, 12). Give the exact value of cos theta .
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The point (9,12) is in the first quadrant, and so the angle in standard position is an acute angle. Now r+=+sqrt%289%5E2+%2B+12%5E2%29+=+15, and so cos%28theta%29+=+x%2Fr+=+9%2F15+=+3%2F5.