How do I find the value of cot 5pi / 6?
2 Answers
Oct 25, 2015
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Ans:
Explanation:
On the trig unit circle,
Trig Table of Special Arcs gives -->
Jan 8, 2016
Explanation:
Note that
Thus, cosine will be negative and sine will be positive.
#cos(pi/6)=sqrt3/2#
#cos((5pi)/6)=-sqrt3/2#
#sin(pi/6)=1/2#
#sin((5pi)/6)=1/2#
Thus,
#cot((5pi)/6)=(-sqrt3/2)/(1/2)=-sqrt3/2(2/1)=-sqrt3#