Further Symmetry Properties and the Pythagorean Identity (VCE SSCE Mathematical Methods): Flashcards

Cofunction identities

$\cos \theta$

$\sin \theta$

$\cos \theta$

$-\sin \theta$

$\cos^2\theta + \sin^2\theta = 1$

All values of $\theta$

$1 - \cos^2\theta$

$1 - \sin^2\theta$

The quadrant the angle is in