Here is the new description with all the links and additional text removed: Learn how to solve equations using the angles sum and difference identities. Using the angles sum and difference identities, ...

This all started with a student my wife was helping with high school trigonometry homework. Here is one of the questions. Here is the solution that the homework was looking for: This uses the ...

Here's the revised YouTube video description without the links: Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply ...

It may be necessary to use Pythagoras' theorem and trigonometry to solve a problem. The trigonometric ratios can be used to solve 3-dimensional problems which involve ...

Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing angle in a right-angled triangle when two sides are known. An understanding of the three ...