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8 March, 14:09

Suppose that sin (theta) = 3/5 and theta is in the second quadrant. Find the values of sin (2 (theta)), cos (2 (theta)), and tan (2 (theta)).

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  1. 8 March, 17:31
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    We are asked to evaluate the value of sin 2 theta, cos 2 theta and tan 2 theta where theta is a 2nd quadrant angle and the expression sin theta = 3/5 is valid. In this case, theta is equal to 143.13 degrees. hence sin2 theta is equal to - 0.96; cos 2 theta is equal to 0.28 and tan 2 theta is equal to - 3.4286
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