Posted by **rick** on Saturday, May 12, 2012 at 11:39pm.

The Pythagorean Theorem gives the relationship between the sides of a right triangle. The following identities show the relationships between the trigonometric functions of a particular angle.

sin2 θ + cos2 θ = 1

tan2 θ + 1 = sec2 θ

1 + cot2 θ = csc2 θ

Why then are these referred to as the Pythagorean Identities?

## Answer this Question

## Related Questions

math - Hi ! Here is my question: The pythagorean theorem gives the relationships...

Pre-Calculus - If θ represents an angle such that sin2θ = tanθ - ...

calculus - P /|\ / | \ / | \ on this side there is an / | \ arc with A(θ) ...

math - if cosθ=2/3 and tanθ<0 find the exact value sin(θ-5&#...

trigonometry - if cosθ=2/3 and tanθ<0 find the exact value sin(&#...

Math Question - Find the values of the six trigonometric functions of an angle ...

math - trig - Suppose ABC is a right triangle with sides of lengths a, b, and c ...

Trigonometry - Which of the following is equivalent to 1 − cos 2 θ/...

trig - The terminal side of θ lies on a given line in the specified ...

math - Prove the following identities: a) (cosec θ + cotθ)(cosecθ...