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Mathematics
Amaya Stewart
24 December, 08:33
Evaluate: sin (225degree)
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Tanner Weiss
24 December, 10:11
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Sin (225)
225 degrees is in the 3rd quadrant. And in the third quadrant only tangent is positive, sin is negative.
For third quadrant, basic angle = 225 - 180 = 45
sin225 = - sin45
sin225 = - sin45 = - 0.7071
sin 225° ≈ - 0.7071
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