Consider the arc of length s on the unit circle that begins at the point (1, 0) and ends at the point (−0.4898, −0.7864). Find csc s, sec s, cot s.

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-(pi-tan^(-1)(y/x))

=-(pi-tan^(-1)(-0.4898/-0.7864))

=-(pi-0.3227pi)

=-0.6777pi

= 121.91 degrees

1 rad= 57.2958 degrees

121.91622 degrees = 2.1278= s (length of the arc)

csc s= 1.1781

sec s= -1.8915

cot s= -0.6228

note that 121.916 degrees is the angle between the points (1,0) and (-0.4898, -0.7864)

sec x= 1/cos x

csc x= 1/sin x

cot x= 1/tan x

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