Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.)
7 cos θ + 1 = 0

Question

Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.)
7 cos θ + 1 = 0

tkhunny · Answer

Have you considered solving for $\cos(\theta)$?

anonymous · Answer

Yeah I got .14+2kpi, but I need another answer. I'm not sure how to find the second half.

tylerd · Answer

|dw:1415421582469:dw|

tkhunny · Answer

$\cos(\theta) = \cos(2\pi - \theta)$.  It's like a thing.

tylerd · Answer

pi-1.4 radians

pi+1.4radians

tylerd · Answer

the adjacent side is negative. so your dealing with quadrants 2 and 3