find all 6 trigonometric ratios for the given angle: a.)-pi/2 b.) 2pi/3 c.)7pi/4

Question

Need help please

Answer 1

-pi/2= -90 degrees

sin90 = -1

cos90 = 0

tan90 = undefined

cot90 = 0

sec90 = undefined

csc90 = -1

2pi/3 =120 degrees

sin120 = sqr3/2

cos120 = -1/2

sec120 = -2

csc120 = 2/sqr3 = 2sqr3/3

tan120 = =sqr3

cot120 = 1/sqr3 = sqr3/3

7pi/4 = 315 degrees

sin315 = -sqr2/2

cos315 = sqr2/2

tan315 = -1

cot315 = -1

sec315 = 2/sqr2 = sqr2

csc315 = -sqr2