Posted by Anonymous on Friday, December 9, 2011 at 11:36am.
so x = 20 , y = -21 , which is in quad IV
r^2= 400+441 = 841
r = √841 = 29
then cos Ø = 20/29
sec Ø = 29/20 = 1.45
Related Questions
trig - Find the values of the six trigonometric functions of an angle 0 in ...
math(advanced algebra&trigonometry) - If θ is an angle in standard ...
trig - (a) sketch an angle A in standard position whose terminal ray passses ...
trig - if the terminal ray of an angle 0 in standard position passes through the...
trig - Find the indicated trigonometric function, given that è is an ...
trig - Find the values of the six trigonometric functions of the angle in ...
Precal - Find the exact values of tangent and cosecant for angle theta in ...
math(advanced algebra&trigonometry) - If a is an angle in standard position ...
trigonometry - 1)find the exact value indicated trigonometric function of &#...
trigonometry - Suppose θ is an angle in standard position whose ...
For Further Reading
