Answer:
tan(19π/3)=√3=1.732
Explanation:
Every trigonometric function has a cycle of 2π, i.e. after 2π, the function is repeated. In fact functions tan and cot repeat after every π.
As tan(19π/3)=tan[(18π+π)/3]=tan(6π+π/3)=tan(π/3)
(as 6π is a multiple of π which is cycle for function tan)
and as tan(π/3)=√3, we have
tan(19π/3)=√3=1.732
