Question

What does `sin(arccos(1))-2cot(arcsec(3))` equal?

Answer 1

`- sqrt2/2`

Explanation:

1. cos x = 1 --> arc x = 2pi --> sin 2pi = 0 -->
   sin (arccos(1) = 0
2. sec y = 3 --> cos y = 1/3 --> arc y = 70^@53.
   tan 70.53 = 2.83 --> cot 70.53 = 0.353
   2cot (arcsec(3) = 0.707

Answer: 0 - 0.707 = - 0.707 (or `-sqrt2/2)`