Discover the formulas and uses of half-angle trig identities with our bite-sized video lesson! See examples and test your knowledge with a quiz for practice.

Understand the half-angle formula and the quadrant rule. Practice examples to learn how to use the half-angle formula and calculate the half-angle cosine.

Learn about double, half, and multiple angle identities in just 5 minutes! Our video lesson covers their solution processes through various examples, plus a quiz.

Learn how to solve half-angle identities with entire angles or multiples of entire angles and see examples that walk through sample problems step-by-step for you to improve your math knowledge and ...

There are a number of identities that apply to the hyperbolic trig functions, and these identities resemble the sum, double-angle, and half-angle identities that may be familiar from the circular ...

Learn to define basic trigonometric identities. Discover the double-angle, half-angle, and other identities. Learn how to use trigonometric identities. See examples.

Learn how to solve half angle identities with angles that are half of special angles, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.

The double and half angle formulas can be used to find the values of unknown trig functions. For example, you might not know the sine of 15 degrees, but by using the half angle formula for sine, you …

Learn to prove and derive trigonometric identities with our video lesson. Explore the tangent, as well as the double and half-angle identities, followed by a quiz.

Half-angle formulas extend our vocabulary of the common trig functions. After reviewing some fundamental math ideas, this lesson uses theorems to develop half-angle formulas for sine, cosine …