If sin(θ) = 0.5, what is θ?

$$θ = 30^\text{o}$$ or $$θ = 150^\text{o}$$ .

If cos(θ) = 0.6, what is θ?

$$θ = 53.13^\text{o}$$ or $$θ = 306.87^\text{o}$$ .

If tan(θ) = 1, what is θ?

$$θ = 45^\text{o}$$ or $$θ = 225^\text{o}$$ .

What is the relationship between the angles in a right triangle?

The sum of the angles in a right triangle is always 180 degrees, with one angle being 90 degrees.

How do you round a number to the nearest hundredth?

Look at the third decimal place; if it's 5 or more, round up the second decimal place by one.

What is the sine of a 90-degree angle?

$$\text{sin}(90^\text{o}) = 1$$ .

What is the cosine of a 0-degree angle?

$$\text{cos}(0^\text{o}) = 1$$ .

What is the tangent of a 45-degree angle?

$$\text{tan}(45^\text{o}) = 1$$ .

Solve for Angles using Trig Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is the definition of sine in a right triangle?

Back

Sine (sin) is the ratio of the length of the opposite side to the length of the hypotenuse.

2.

FLASHCARD QUESTION

Front

What is the definition of cosine in a right triangle?

Back

Cosine (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse.

3.

FLASHCARD QUESTION

Front

What is the definition of tangent in a right triangle?

Back

Tangent (tan) is the ratio of the length of the opposite side to the length of the adjacent side.

4.

FLASHCARD QUESTION

Front

What is the Pythagorean theorem?

Back

5.

FLASHCARD QUESTION

Front

How do you find the measure of an angle using sine?

Back

6.

FLASHCARD QUESTION

Front

How do you find the measure of an angle using cosine?

Back

7.

FLASHCARD QUESTION

Front

How do you find the measure of an angle using tangent?

Back

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