Cofunction Identities for Sine, Tangent, and Cosecant

This video explains how to determine a cofunction identity.

Advertisements

Find 6 Trig Function Values of 315 Degrees (Reference Triangle and Unit Circle)

This video explains how to determine the sine, cosine, tangent, cosecant, secand, and cotangent function values of 315 degrees using a reference triangle and the unit circle.

Find 6 Trig Function Values of 210 Degrees (Reference Triangle and Unit Circle)

This video explains how to determine the sine, cosine, tangent, cosecant, secand, and cotangent function values of 210 degrees using a reference triangle and the unit circle.