Problem : Which trigonometric function is equivalent to this expression: sin( - x)?

sin( - x) = cos(x).

Problem : What are the amplitude and period of y = - 3 sin(2x + 1)?

Amplitude = 3. Period = Π.

Problem : What are the amplitude and period of y = cos(x)?

Amplitude = . Period = 4Π.

Problem : Which of the trigonometric functions are even, which are odd, and which are neither?

Cosine and Secant are even. Sine, cosecant, tangent, and cotangent are odd.

Problem : What are the period and amplitude of the function below?

Amplitude = 1. Period = Π.