Determine the value of a Trigonometric Function

Front

Which function is the reciprocal of the sine?

Back

Cosecant (csc) is the reciprocal of sine (sin).

Front

The tangent of an acute angle in a triangle is the ratio of which two of its sides?

Back

The tangent of an acute angle is the ratio of the opposite side to the adjacent side (opposite/adjacent).

Front

What is the length of the radius of a unit circle?

Back

The length of the radius of a unit circle is one unit.

Front

In which quadrants is the cosine function positive?

Back

The cosine function is positive in the 1st and 4th quadrants.

Front

What is the definition of sine in a right triangle?

Back

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

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.

Front

What is the definition of tangent in a right triangle?

Back

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

Front

What is the relationship between sine and cosine?

Back

Sine and cosine are co-functions; sin(θ) = cos(90° - θ) and cos(θ) = sin(90° - θ).

Front

What is the Pythagorean identity involving sine and cosine?

Back

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

Front

What is the value of sin(0°)?

Back

The value of sin(0°) is 0.