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NewtonianAlch
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Homework Statement
Find the phase angle between i1 = -4 sin (377t + 25) and i2 = 5 cos (377t - 40)
The Attempt at a Solution
I first made i2 in terms of sine: 5 cos (377t - 40) => -5 sin (377t + 50) => 5 sin (377t + 230)
Now to make i1 positive as well: -4 sin (377t + 25) => 4 sin (377t + 205)
Comparing these two now, i2 leads i1 by 25 degrees.
Although the answer in the lecture notes say i1 leads i2 by 155.
What has gone wrong here?