Hi all,
I'm stuck on the following two questions:
1)An eletrical element draws a current of i(t) = 10cos4t A and has a voltage of v(t) = 120cos4t V across it. Find energy absorbed by the element in 2s.
2)The voltage across a device and the current through it are
v(t) = 5cos2t V i(t) = 10 (1 - e^0.5t) A
Calculate the power consumed by this device at t = 1 s.
I know P = intregral( i(t) x v(t) dt) but I don't know how to integrate the product of two trigonometric functions, or the product of a trigonometric and exponential function. Am I going about this the wrong way?
I'm stuck on the following two questions:
1)An eletrical element draws a current of i(t) = 10cos4t A and has a voltage of v(t) = 120cos4t V across it. Find energy absorbed by the element in 2s.
2)The voltage across a device and the current through it are
v(t) = 5cos2t V i(t) = 10 (1 - e^0.5t) A
Calculate the power consumed by this device at t = 1 s.
I know P = intregral( i(t) x v(t) dt) but I don't know how to integrate the product of two trigonometric functions, or the product of a trigonometric and exponential function. Am I going about this the wrong way?