What is an identity

The video tutorial explains the concept of identities in mathematics, starting with basic examples like 1=1 and a-a=0. It discusses the importance of ensuring both sides of an equation are equivalent to establish an identity. The tutorial also covers famous identities, such as a*1/a=1, and delves into verifying identities using algebraic and trigonometric expressions. The key takeaway is understanding that identities hold true regardless of the values plugged into the variables, ensuring both sides of the equation remain equal.

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