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zizkio46
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Homework Statement
cos(squared)x = sinx-1/2
Homework Equations
cos(squared)x= 1-sin(squared)x
The Attempt at a Solution
I tried everything but my answer does not match my answers in calculator
A trigonometric identity is a mathematical equation that relates different trigonometric functions and their arguments. These identities are true for all values of the variables involved.
Trigonometric identities are useful in simplifying and solving equations involving trigonometric functions. They also allow us to prove other mathematical theorems and make calculations easier.
The most commonly used trigonometric identities include the Pythagorean identities, double angle identities, half angle identities, and sum and difference identities.
To prove a trigonometric identity, we use algebraic manipulations and known trigonometric identities to transform one side of the equation into the other. This shows that both sides are equal and the identity is true.
A trigonometric identity is always true, while a trigonometric equation may only be true for certain values of the variables. Additionally, an equation typically involves solving for an unknown value, while an identity does not.