5/6 Flashcard: Trigonometric Ratios and the Unit Circle

Front

What are the three primary trigonometric ratios?

Back

Sine (sin), Cosine (cos), Tangent (tan).

Front

What does SOH CAH TOA stand for?

Back

SOH: Sine = Opposite/Hypotenuse; CAH: Cosine = Adjacent/Hypotenuse; TOA: Tangent = Opposite/Adjacent.

Front

How do you find the missing angle using inverse trigonometric ratios?

Back

Use the inverse functions: sin⁻¹, cos⁻¹, or tan⁻¹ on the ratio of the sides.

Front

What is the range of angles for the sine function?

Back

The range is from -1 to 1.

Front

In which quadrant is the angle 135° located?

Back

Quadrant II.

Front

How do you convert degrees to radians?

Back

Multiply the degree measure by π/180.

Front

Convert 150° to radians.

Back

5π/6.

Front

How do you convert radians to degrees?

Back

Multiply the radian measure by 180/π.

Front

Convert 4π/3 radians to degrees.

Back

240°.

Front

What is the exact value of cos(30°)?

Back

√3/2.