Cos п+ ctg 5п/6 - sin 7п/3 + tg(-п)

Question

Cos п+ ctg 5п/6 - sin 7п/3 + tg(-п)

Answer 1

Cos п+ ctg 5п/6 - sin 7п/3 + tg(-п)= -1 -1/√3 - √3/2  +0 = -1 - 5√3/6