The terminal arm of theta passes through 5 3 What is the cos

The terminal arm of theta passes through (-5, -3), What is the cosine ratio of theta? Draw a diagram and explain what angles have the same sine ratio as 140 degree.

Solution

18.Point is (-5,-3)

tan theta=y/x =-3/-5=3/5

opposite=3

adjacent=5

hypotenuse=sqrt(9+25)=sqrt34

cos theta=adjacent/hypotenuse=-5/sqrt34