How do I prove and apply trigonometric identities?
In this post, we will be proving and applying the trigonometric Pythagorean identities below, as a part of the Prelim Maths Advanced course under the topic Trigonometric Functions and sub-part Trigonometric Functions. We learn the difference between an equation and an identity.
- cos^{2}(x) + sin^{2}(x) = 1
- 1 + tan^{2}(x) = sec^{2}(x)
- 1 + cot^{2}(x) = cosec^{2}(x)
This video covers the three types of Pythagorean identities and examples of how they are used and proved.
What is the difference between equations and identities?
The following video covers the main difference between equations and identities, and how they are used.
