Question

What does `cos(arctan(3))+2sin(arc cot(5))` equal?

Answer 1

0.72

Explanation:

Find (arctan (3)) --> tan x = 3, --> arc `x = 71^@57.`
cos x = cos 71.57 = 0.32
Find (arccot (5)) --> cot y = 5 --> `tan y = 1/5`--> arc `y = 11^@31`
--> 2sin (11.31) = 2(0.2) = 0.4
`cos (arctan (3)) + 2sin (arccot (5)) = = 0.32 + 0.4 = 0.72`