How to solve the following trigonmetric equations without using calculator?
1)$\pi +\arccos{(x)}=\cot{(\arcsin{(x)})}=\frac{\sqrt{1-x^2}}{x}$
2)$\theta-\tan{(\theta)}=2\pi$
Answers: Using hp 50g graphing calculator, i got answer to the first question as 0.217233628212
Using hp 50g graphing calculator, I got answer answer to second question 1.78977584927 and -1.44206652976