- #1
ilikeicetea
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Homework Statement
what is the integration of 1/2 sin y dy from 0 to pie/2
Homework Equations
i know sin y = -cos y (integration)
The Attempt at a Solution
from 1/2 sin y dy to (1/2) -cos y then i plot pie/2 and 0
i got (1/2) [-cos (pie/2) - (-cos 0)] = 0, but the answer is 1/2
i mean -cos (pie/2) = -1 & cos 0 = 1
Thank you for helping