How do you find the sine of an angle that is 45 degrees?


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Sine The sin of a 45 degree angle is 2. To find the trigonometric value of an angle, then just read it off the triangle: the sine of theta is (opposite) over (hypoteneuse), or 1/sqrt(2); the cosine of theta is (adjacent) over (hypoteneuse), or 1/sqrt(2).

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