How do you find an angle using sine?

To find an angle using sine, use the inverse sine function: $$\theta = \text{sin}^{-1}igg(\frac{\text{opposite}}{\text{hypotenuse}}igg)$$ .

How do you find an angle using cosine?

To find an angle using cosine, use the inverse cosine function: $$\theta = \text{cos}^{-1}igg(\frac{\text{adjacent}}{\text{hypotenuse}}igg)$$ .

How do you find an angle using tangent?

To find an angle using tangent, use the inverse tangent function: $$\theta = \text{tan}^{-1}igg(\frac{\text{opposite}}{\text{adjacent}}igg)$$ .

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

In a right triangle, the sum of the angles is always 180 degrees. One angle is 90 degrees, so the other two angles must sum to 90 degrees.

What is the value of sin(40°)?

Using a calculator, $$\text{sin}(40°) \text{ is approximately } 0.6428$$ .

What is the value of cos(40°)?

Using a calculator, $$\text{cos}(40°) \text{ is approximately } 0.7660$$ .

What is the value of tan(40°)?

Using a calculator, $$\text{tan}(40°) \text{ is approximately } 0.8391$$ .

How do you round an angle to the nearest tenth?

To round an angle to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up. If it is less than 5, round down.

Resource Library

Math

Geometry

Finding Missing Sides

Right Triangle Trig Finding Missing Sides And Angles

Right Triangle Trig Finding Missing Sides and Angles

Flashcard

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Mathematics

•

8th - 10th Grade

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Practice Problem

•

Hard

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FLASHCARD QUESTION

Front

What is the sine ratio in a right triangle?

Back

FLASHCARD QUESTION

Front

What is the cosine ratio in a right triangle?

Back

FLASHCARD QUESTION

Front

What is the tangent ratio in a right triangle?

Back

FLASHCARD QUESTION

Front

How do you find the missing side using sine?

Back

FLASHCARD QUESTION

Front

How do you find the missing side using cosine?

Back

FLASHCARD QUESTION

Front

How do you find the missing side using tangent?

Back

FLASHCARD QUESTION

Front

What is the Pythagorean theorem?

Back

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