θ lies in Quandrant I

cos θ = 5/6

What is the exact value of sin θ in simplified form?

A. -√11/6

B. √11/5

C. √11/6

D. - 5√11 / 11

whosmans Nov 27, 2018

#1**+2 **

In quadrant 1 sin and cos are both POSITIVE

cos^2 + sin^2 = 1

(5/6)^2 + sin^2 = 1

sin^2 = 1- 25/36

sin^2 = 11/36

sin = sqrt(11) / 6 (the positive sq rt of 11/36)

ElectricPavlov Nov 27, 2018