Trigonometry Identites for Ishaan

tanθ - Quotient Identities

sinθ/cosθ

cotθ - Quotient Identities

cosθ/sinθ

cotθ - Reciprocal Identities

1/tanθ

cscθ - Reciprocal Identities

1/sinθ

secθ - Reciprocal Identities

1/cosθ

sin²θ + cos²θ

1

tan²θ + 1

sec²θ

1 + cot²θ

csc²θ

sin(a+b)

sin(a) cos(b) + cos(a) sin(b)

cos(a+b)

cos(a) cos(b) - sin(a) sin(b)

tan(a+b)

(tan(a) + tan(b)) / 1 - tan(a) tan(b)

sin(a-b)

sin(a) cos(b) - cos(a) sin(b)

cos(a-b)

cos(a) cos(b) + sin(a) sin(b)

tan(a-b)

(tan(a) - tan(b)) / 1 + tan(a) tan(b)

sin(2a)

2sin(a) cos(a)

cos(2a)

cos²(a)-sin²(a)

cos(2a)

2cos²(a)-1

cos(2a)

1-2sin²(a)

tan(2a)

2tan(a) / 1 - tan²(a)

y=sin^-1(x) Domain

[-1,1]

y=sin^-1(x) Range

[-pi/2,pi/2]

y=cos^-1(x) Domain

[-1,1]

y=cos^-1(x) Range

[0,pi]

y=tan^-1(x) Domain

(-infinit-infiniti)

y=tan^-1(x) Range

(-pi/2,pi/2)

Arccos

Arcsin

Arctan