Trigonometry Review

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.

Tags

CCSS.HSG.SRT.C.6

Front

What is the cosine of angle T if cos T = 5/13?

Back

The cosine of angle T is 5/13.

Tags

CCSS.HSG.SRT.C.7

Front

How do you find the missing angle in a right triangle?

Back

Use the inverse trigonometric functions or the fact that the sum of angles in a triangle is 180 degrees.

Tags

CCSS.HSG.SRT.C.8

Front

What is the value of x if cos x = 12/13?

Back

x = 22.6° (approximately) when rounded to the nearest tenth.

Tags

CCSS.HSF.TF.B.7

Front

What is the sine of an angle in a right triangle?

Back

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

Tags

CCSS.HSG.SRT.C.6

Front

What is the tangent of an angle in a right triangle?

Back

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

Tags

CCSS.HSG.SRT.C.6

Front

If sin A = 3/5, what is cos A?

Back

Using the Pythagorean identity, cos A = 4/5.

Tags

CCSS.HSF.TF.C.8

Front

What is the Pythagorean identity?

Back

The Pythagorean identity states that sin²(θ) + cos²(θ) = 1.

Tags

CCSS.HSF.TF.C.8

Front

How do you convert degrees to radians?

Back

Multiply the degree measure by π/180.

Tags

CCSS.HSF.TF.A.1

Front

What is the value of x if sin x = 0.5?

Back

x = 30° or 150° (in the range of 0° to 360°).

Tags

CCSS.HSF.TF.B.7