If $$x = 16$$ , what is $$y$$ if $$y = 16\frac{1}{\text{sqrt}(2)}$$ ?

The values are $$x = 16$$ and $$y = 16\frac{1}{\text{sqrt}(2)}$$ .

If $$x = 17$$ , what is $$y$$ if $$y = 34\frac{1}{\text{sqrt}(3)}$$ ?

The values are $$x = 17$$ and $$y = 34\frac{1}{\text{sqrt}(3)}$$ .

What is the Law of Cosine?

It relates the lengths of the sides of a triangle to the cosine of one of its angles.

How do you find the length of a side in a right triangle using sine?

Use the formula: $$\text{sine}(\theta) = \frac{\text{opposite}}{\text{hypotenuse}}$$ .

What is the formula for cosine in a right triangle?

$$\text{cosine}(\theta) = \frac{\text{adjacent}}{\text{hypotenuse}}$$ .

What is the formula for tangent in a right triangle?

$$\text{tangent}(\theta) = \frac{\text{opposite}}{\text{adjacent}}$$ .

If $$\theta = 30^\text{o}$$ , what is $$\text{sine}(\theta)$$ ?

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

If $$\theta = 60^\text{o}$$ , what is $$\text{cosine}(\theta)$$ ?

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

If $$\theta = 45^\text{o}$$ , what is $$\text{tangent}(\theta)$$ ?

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

What is the relationship between the angles in a triangle?

The sum of the angles in a triangle is always 180 degrees.

Chapter 5 Review Flashcards

Student preview

15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the primary use of sine, cosine, and tangent?

Back

They are used to find the ratios of the sides of right triangles.

2.

FLASHCARD QUESTION

Front

What type of triangles can sine, cosine, and tangent be applied to?

Back

Right triangles only.

3.

FLASHCARD QUESTION

Front

Back

4.

FLASHCARD QUESTION

Front

Back

5.

FLASHCARD QUESTION

Front

Which rule is used to find the measure of angle B in a triangle?

Back

Law of Sine.

6.

FLASHCARD QUESTION

Front

Back

7.

FLASHCARD QUESTION

Front

What is the Law of Sine?

Back

It states that the ratio of a side of a triangle to the sine of its opposite angle is constant.

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