Right Triangle Trigonometry Review

Front

What is the Pythagorean theorem?

Back

Front

Define sine in the context of a right triangle.

Back

Front

Define cosine in the context of a right triangle.

Back

Front

Define tangent in the context of a right triangle.

Back

Front

What is the mnemonic used to remember the trigonometric ratios?

Back

The mnemonic used to remember the trigonometric ratios is 'SOH CAH TOA', which stands for: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.

Front

How do you find the angle using the sine function?

Back

Front

If sin(θ) = 0.5, what is θ?

Back

If sin(θ) = 0.5, then θ = 30° or θ = 150° (in degrees), since sine is positive in the first and second quadrants.

Front

What is the relationship between sine and cosine for complementary angles?

Back

Front

How do you solve for a side in a right triangle using trigonometric ratios?

Back

To solve for a side in a right triangle, identify the known angle and the sides involved. Use the appropriate trigonometric ratio (sine, cosine, or tangent) to set up an equation and solve for the unknown side.

Front

What is the cosine of 37 degrees?

Back

The cosine of 37 degrees is approximately 0.7986.