65°
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90 degrees
It is not. The angle of reference is 2*pi radians or 360 degrees.
The cotangent function is the reciprocal of the tangent function, so cot(115 degrees) is equivalent to 1/tan(115 degrees). Since tan(115 degrees) is equivalent to -tan(65 degrees) due to the periodicity of the tangent function, cot(115 degrees) simplifies to -tan(65 degrees), which corresponds to option A.
60
Cosecant(115 deg) = 1/sine(115 deg) = 1/0.9063 = 1.1034