What are the six trig function values of (13pi)/4?

1 Answer
Nghi N.
Dec 13, 2015

Find 6 trig function values of (13pi)/4

Explanation:

Call (13pi/4) = x
sin x = sin (13pi)/4 = sin ((5pi)/4 + 2pi) = sin (pi/4 + pi) =
= -sin (pi/4) = -sqrt2/2
cos x = (pi/4 + pi) = - cos (pi/4) = - sqrt2/2
tan x = sin x/(cos x) = 1
cot x = 1
sec x = -2/sqrt2 = -sqrt2
csc x = -2/sqrt2 = -sqrt2

Related questions
See all questions in Trigonometric Functions of Any Angle
Impact of this question
11606 views around the world
You can reuse this answer
Creative Commons License