1 + cot2x = csc2x
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1/(tangent of angle)
Cotangent is 1 / tangent. Since tangent is sine / cosine, cotangent is cosine / sine.
Cotangent(0.675 radians) = 84.88 approx.
The cotangent of 510 degrees is: -1.73205081
To determine what negative sine squared plus cosine squared is equal to, start with the primary trigonometric identity, which is based on the pythagorean theorem...sin2(theta) + cos2(theta) = 1... and then solve for the question...cos2(theta) = 1 - sin2(theta)2 cos2(theta) = 1 - sin2(theta) + cos2(theta)2 cos2(theta) - 1 = - sin2(theta) + cos2(theta)