2017-09-30-111852.sagews

show(sin(5*pi/6))

$\displaystyle \frac{1}{2}$

show(cos(5*pi/6))

$\displaystyle -\frac{1}{2} \, \sqrt{3}$

show(tan(5*pi/6))

$\displaystyle -\frac{1}{3} \, \sqrt{3}$

show(sec(5*pi/6))

$\displaystyle -\frac{2}{3} \, \sqrt{3}$

show(csc(5*pi/6))

$\displaystyle 2$

show(cot(5*pi/6))

$\displaystyle -\sqrt{3}$

show(sin(9*pi/2))

$\displaystyle 1$

show(cos(9*pi/2))

$\displaystyle 0$

show(tan(9*pi/2))

$\displaystyle \infty$

show(sec(9*pi/2))

$\displaystyle \infty$

show(csc(9*pi/2))

$\displaystyle 1$

show(cot(9*pi/2))

show(arcsin(-7.5))

show(arcsin(-.5))

$\displaystyle -0.523598775598299$

show(arctan(-100))