What is the sine of a 30-degree angle?

$$\text{sin}(30^\text{o}) = \frac{1}{2}$$ .

What is the cosine of a 60-degree angle?

$$\text{cos}(60^\text{o}) = \frac{1}{2}$$ .

If $$\text{sin}(\theta) = \frac{3}{5}$$ , what is $$\text{cos}(\theta)$$ ?

Use the identity: $$\text{cos}^2(\theta) + \text{sin}^2(\theta) = 1$$ . Thus, $$\text{cos}(\theta) = \frac{4}{5}$$ .

What is the definition of the hypotenuse in a right triangle?

The hypotenuse is the longest side of a right triangle, opposite the right angle.

How do you calculate the angle using the tangent ratio?

Use the formula: $$\theta = \tan^{-1}\frac{opposite}{adjacent}$$ .

What is the sine ratio used for in right triangle problems?

To find the length of the opposite side or the angle when the hypotenuse is known.

What is the cosine ratio used for in right triangle problems?

To find the length of the adjacent side or the angle when the hypotenuse is known.

Right Triangle Trig Flashcards

Student preview

15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the definition of Tangent in a right triangle?

Back

Tags

CCSS.HSG.SRT.C.6

2.

FLASHCARD QUESTION

Front

Which trigonometric ratio is used to find the length of the opposite side?

Back

Tags

CCSS.HSG.SRT.C.6

3.

FLASHCARD QUESTION

Front

What is the formula to find the missing angle in a right triangle?

Back

Tags

CCSS.HSG.SRT.C.8

4.

FLASHCARD QUESTION

Front

What is the ratio for Cosine in a right triangle?

Back

Tags

CCSS.HSG.SRT.C.6

5.

FLASHCARD QUESTION

Front

Back

Tags

CCSS.HSG.SRT.C.6

6.

FLASHCARD QUESTION

Front

What is the relationship between the sides of a right triangle and the Pythagorean theorem?

Back

Tags

CCSS.8.G.B.8

7.

FLASHCARD QUESTION

Front

How do you find the length of the hypotenuse if the other two sides are known?

Back

Tags

CCSS.8.G.B.8

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