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In the standard (x,y) coordinate plane below, an angle is shown whose vertex is the origin. One side of this angle with measure θ passes through (4,-3), and the other side includes the positive x-axis. What is the cosine of θ?

26 Jun

In the standard (x,y) coordinate plane below, an angle is shown whose vertex is the origin. One side of this angle with measure θ passes through (4,-3), and the other side includes the positive x-axis. What is the cosine of θ?

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