Q5

5. The voltage V supplied to an electrical circuit is given by V = 155 sin(120n't) rwhere t is the time since the power was switched on. a) Find an expression for the rate of change of the voltage, in volts per second. Use exact values. [1 point] b) How fast is the voltage changing after i of a second? [1 point] _ . 1 . . c) How fast is the voltage changing after Q; of a second? Give your answer either as an exact value, or correct to the nearest tenth of a volt per second. [1 point]