Trigonometric Identity Equations

Question 1

Equation for x² + y² = 1

Answer 1

Cos²θ + sin²θ = 1

Question 2

Equation using sinθ = o/h, cosθ = a/h and tanθ = o/a

Answer 2

Tanθ = sinθ/cosθ

Question 3

Equation involving cot²θ and cosec²θ

Answer 3

1 + cot²θ = cosec²θ

Question 4

Equation involving cotθ, sinθ and cosθ

Answer 4

cotθ = cosθ/sinθ

Question 5

Equation involving tan²θ and sec²θ

Answer 5

tan²θ + 1 = sec²θ

Question 6

Arcsinx

Answer 6

(Sinx)^-1

Question 7

Arccosx

Answer 7

(Cosx)^-1

Question 8

Arctanx

Answer 8

(Tanx)^-1