The terminal side of an angle theta in standard position passes through the point (-4,-6). Use the figure to figure out the following value. Cos theta

Answer 1

(-4,-6) as terminal point has distance to the origin = sqr(16+36) =sqr52 = 4sqr13

Cos(Theta) = x/sqr(x^2+y^2) = -4/4sqr13 = -1/sqr13

= -(sqr13)/13