Tg7pi/4+sin(-7pi/6)-2cos(-11pi/6)

Question

Tg7pi/4+sin(-7pi/6)-2cos(-11pi/6)

Answer 1

Sin (-7 pi) + 2 cos (31pi/3) - tg(7pi/4)=
= sin ( - 8pi + pi) + 2* cos( 10 pi + pi/3) - tg ( 2 pi   -  pi/4) =
= sin (-pi) + 2* cos(pi/3) - tg( - pi/4) =
= 0 + 2* 1/2  - (-1) = 1 + 1 = 2