trig functions

sin (pi/6)

1/2

cos (pi/6)

root 3 over 2

tan (pi/6)

root 3 over 3

sin (pi/4)

root 2 over 2

cos (pi/4)

root 2 over 2

tan (pi/4)

1

sin (pi/3)

root 3 over 2

cos (pi/3)

1/2

tan (pi/3)

root 3

sin (pi/2)

1

cos (pi/2)

0

tan (pi/2)

undefined

Pythagorean Identities of tan and sec

tan^2theta+1=sec^2theta

pythagoren Identities of cot and csc

cot^2theta+1=csc^2theta

Pythagorean Identities of sin and cos

sin^2theta+cos^2theta=1

double angle formula of cos

cos^2theta - sin^2theta

double angle formula of sin

2sintheta*costheta

range of sin inverse

[-pi/2, pi/2]

range of cos inverse

[0, pi]

range of tangent inverse

[-pi/2, pi/2]

double angle formula of tangent

2tantheta/1-tan^2theta

half angle formula of tangent

sintheta/1+costheta