Precal trig ratios

cscθ (reciprocal identity)

1/sinθ

secθ (reciprocal identity)

1/cosθ

cotθ (reciprocal identity)

1/tanθ

sinθ (reciprocal identity)

1/cscθ

cosθ (reciprocal identity)

1/secθ

tanθ (reciprocal identities)

1/cotθ

tanθ (quotient identity)

sinθ/cosθ

cotθ (quotient identity)

cosθ/sinθ

tan^nθ (quotient identity)

sin^nθ/cos^nθ

cot^nθ (quotient identity)

cos^nθ/sin^nθ

cos^2θ+sin^2θ (Pythagorean identities)

1

1+tan^2θ (Pythagorean identities)

sec^2θ

cot^2θ + 1 (Pythagorean identities)

csc^2θ

cos^2θ (Pythagorean identities)

1-sin^2θ

sin^2θ (Pythagorean identities)

1-cos^2θ

sec^2θ-tan^2θ (Pythagorean identities)

1

sec^2θ-1 (Pythagorean identity)

tan^2θ

cot^2θ (Pythagorean identity)

csc^2θ-1

csc^2θ-cot^2θ (Pythagorean identity)

1

sin(π/2 - θ) (cofunction identity)

cosθ

tan(π/2-θ) (cofunction identity)

cotθ

sec(π/2-θ) (cofunction identity)

cscθ

cos(π/2 - θ) (cofunction identity)

sinθ

cot(π/2 - θ) (cofunction identity)

tanθ

csc(π/2-θ) (cofunction identity)

secθ

sin(-θ) (Odd/Even Identities)

-sinθ (odd)

cos(-θ) (Odd/Even Identities)

cosθ (even)

tan(-θ) (Odd/Even Identities)

-tanθ (odd)

csc(-θ) (Odd/Even Identities)

-cscθ (odd)

sec(-θ) (Odd/Even Identities)

secθ (even)

cot(-θ) (Odd/Even Identities)

-cotθ (odd)

csc^nθ (reciprocal extended)

1/sin^nθ

cos^nθ (reciprocal extended)

1/sec^nθ

sin^nθ (reciprocal extended)

1/csc^nθ

tan^nθ (reciprocal extended)

1/cot^nθ

cot^nθ (reciprocal extended)

1/tan^nθ

sec^nθ (reciprocal extended)

1/cos^nθ

Tan^-1(