Question

What does `sin(arctan(6))-4sin(arcsec(5))` equal?

Answer 1

`sin(arctan(6))-4sin(arcsec(5))`

`=sin(cot^-1(1/6))-4sin(cos^-1(1/5))`

`=sin(csc^-1sqrt(1+1/6^2))-4sin(sin^-1sqrt(1-1/5^2))`

`=sinsin^-1(6/sqrt37)-4sinsin^-1(sqrt24/5)`

`=6/sqrt37-(8sqrt6)/5`