Calculators!

[Tavrobel]

(cos(cos(cos(cos
(cos(cos(cos(cos
(tan(tan(tan(tan(2))
cos(cos(cos(cos(4)))
(sin(sin(cos(tan
(sin(cos(1)))
(cos(cos(tan(cos(1))))
(tan(tan(tan(tan
(tan(cos(sin(tan(cos(1)^tan(89.99999)

Press Equals, and sit and wait. Oh the joy.

When in Radians, .7259.
When in Degrees, .9998.

Didn't take long at all.