Question

Given that sin (a-b)=sina cosb-cosa sinb and cos (a-b)=cosa cosb+sina cosb find the values of sin75 and cos 75 hence find the value of tan75

Answer 1

The charge of the electron is equivalent to the magnitude of the elementary charge (e) but bearing a negative sign. Since the value of the elementary charge is roughly 1.602 x 10-19coulombs (C), then the charge of the electron is -1.602 x 10-19 C.