Basic Trig Functions

Front

What is the definition of sine (sin) in a right triangle?

Back

The sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the definition of cosine (cos) in a right triangle?

Back

The cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the definition of tangent (tan) in a right triangle?

Back

The tangent of an angle 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 cosecant (csc)?

Back

Cosecant is the reciprocal of sine: csc(θ) = 1/sin(θ).

Front

What is the relationship between cosine and secant (sec)?

Back

Secant is the reciprocal of cosine: sec(θ) = 1/cos(θ).

Front

What is the relationship between tangent and cotangent (cot)?

Back

Cotangent is the reciprocal of tangent: cot(θ) = 1/tan(θ).

Front

What is sin(45º)?

Back

√2/2

Front

What is cos(45º)?

Back

√2/2

Front

What is tan(45º)?

Back

1

Front

What is csc(30º)?

Back

2