What is the sum of the squares of sine and cosine?

$$\text{sin}^2\theta + \text{cos}^2\theta = 1$$

What is the formula for the tangent of a sum of angles?

$$\text{tan}(A + B) = \frac{\text{tan}A + \text{tan}B}{1 - \text{tan}A \text{tan}B}$$

What is the formula for the sine of a sum of angles?

$$\text{sin}(A + B) = \text{sin}A \text{cos}B + \text{cos}A \text{sin}B$$

What is the formula for the cosine of a sum of angles?

$$\text{cos}(A + B) = \text{cos}A \text{cos}B - \text{sin}A \text{sin}B$$

What is the identity for the sine of a difference of angles?

$$\text{sin}(A - B) = \text{sin}A \text{cos}B - \text{cos}A \text{sin}B$$

What is the identity for the cosine of a difference of angles?

$$\text{cos}(A - B) = \text{cos}A \text{cos}B + \text{sin}A \text{sin}B$$

Resource Library

Math

Trigonometry

Trigonometric Identities

Trigonometric Identities Review

Flashcard

•

Mathematics

•

9th - 12th Grade

•

Practice Problem

•

Hard

•

CCSS

HSF.TF.C.9, HSF.TF.C.8, HSF.TF.A.4

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FLASHCARD QUESTION

Front

What is the Pythagorean identity for sine and cosine?

Back

Tags

CCSS.HSF.TF.C.8

FLASHCARD QUESTION

Front

What is the identity for secant in terms of cosine?

Back

Tags

CCSS.HSF.TF.A.4

FLASHCARD QUESTION

Front

What is the identity for cosecant in terms of sine?

Back

FLASHCARD QUESTION

Front

What is the relationship between tangent and sine/cosine?

Back

Tags

CCSS.HSF.TF.C.8

FLASHCARD QUESTION

Front

What is the double angle formula for sine?

Back

Tags

CCSS.HSF.TF.C.9

FLASHCARD QUESTION

Front

What is the double angle formula for cosine?

Back

Tags

CCSS.HSF.TF.C.9

FLASHCARD QUESTION

Front

What is the identity for cotangent in terms of cosine and sine?

Back

Tags

CCSS.HSF.TF.A.2

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