What is the amplitude of the function f(x)=-5sin(pi Theta )+3 a. 5 b.3 C. -5 d. pi e -3

The amplitude of a sinusoidal function of the form *A*sin( *B*x + *C*) + *D* is the absolute value of *A*.In the given function, , *A* is -5. Therefore, the amplitude is .So the answer is (a).