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# Need a trig explanation?

I tried posting this question last night, but I got a sole response that didn't help. Better luck during daytime?

I came across questions that might be asked on my Trig Final that I have no idea how to do. If you could tell me how to do these? An example problem:

Given that cos x + i sin y = sin x + i, find all correct x and y values between 0 and 2pi.

Update:

@Archimedes

Wow, that made it click. Seems so much simpler than what I was trying to make of it xD

### 1 Answer

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- BullwinkleLv 77 years agoFavorite Answer
equate the real parts

equate the imaginary parts

cos x = sin x

x = π/4, 5π/4

i sin y = i

sin y = 1

y = π/2, 3π/2

check

archimedes

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