What is the identity 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 identity 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?

$$\text{cos}(a - b) = \text{cos}(a)\text{cos}(b) + \text{sin}(a)\text{sin}(b)$$

What is the secant function in terms of cosine?

$$\text{sec}(x) = \frac{1}{\text{cos}(x)}$$

What is the cosecant function in terms of sine?

$$\text{csc}(x) = \frac{1}{\text{sin}(x)}$$

What is the relationship between tangent and cotangent?

$$\text{tan}(x) = \frac{1}{\text{cot}(x)}$$

What is the identity for the sine of a double angle?

$$\text{sin}(2\theta) = 2\text{sin}(\theta) \text{cos}(\theta)$$

Trig Identities Flashcards

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the double angle formula for sine?

Back

Tags

CCSS.HSF.TF.C.9

2.

FLASHCARD QUESTION

Front

What is the double angle formula for cosine?

Back

Tags

CCSS.HSF.TF.C.9

3.

FLASHCARD QUESTION

Front

What is the Pythagorean identity?

Back

Tags

CCSS.HSF.TF.C.8

4.

FLASHCARD QUESTION

Front

What is the relationship between sine and cosine?

Back

Tags

CCSS.HSF.TF.A.4

5.

FLASHCARD QUESTION

Front

What is the co-function identity for sine?

Back

6.

FLASHCARD QUESTION

Front

What is the co-function identity for cosine?

Back

7.

FLASHCARD QUESTION

Front

What is the tangent of an angle in terms of sine and cosine?

Back

Tags

CCSS.HSF.TF.C.8

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