What is the formula for $$\tan^2x$$ in terms of sine and cosine?

The formula is $$\tan^2x = \frac{\text{sin}^2x}{\text{cos}^2x}$$ .

How do you verify trigonometric identities?

To verify trigonometric identities, simplify both sides of the equation to see if they are equal.

What is the first step in simplifying $$\frac{\text{sec}^2x - 1}{\text{sec}^2x}$$ ?

The first step is to use the Pythagorean Identity: $$\text{sec}^2x - 1 = \tan^2x$$ .

What is the formula for the sine of an angle in a right triangle?

The sine of an angle is defined as: $$\text{sin}x = \frac{\text{opposite}}{\text{hypotenuse}}$$ .

What does it mean to factor a common factor in trigonometric expressions?

Factoring a common factor means to extract the greatest common factor from the terms in the expression.

What is the formula for cosine in terms of sine?

The cosine function can be expressed as: $$\text{cos}x = \text{sqrt}(1 - \text{sin}^2x)$$ .

What is the purpose of separating fractions in trigonometric expressions?

Separating fractions can help simplify the expression and make it easier to work with.

What is the relationship between cotangent and tangent?

The cotangent function is the reciprocal of the tangent function: $$\text{cot}x = \frac{1}{\tan x}$$ .

What is the first strategy to simplify the right side of a trigonometric equation?

Using a Pythagorean Identity is often the first strategy to simplify the right side of a trigonometric equation.

Practice Trig Identities Flashcard

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What is a Pythagorean Identity?

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