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also any sites with a better, easy to understand, definition would be greatly appriciated

but PRQ is only one of the complementary angles, how do i know that it is half of 90?

|dw:1357875756276:dw|
Just drawing diagram here

im sorry we got it switched around somewhere its RPQ not
PQR

they are proving that RPQ=alpha

Since PRQ is a right triangle with right angle PRQ, RPQ and RQP are complementary.

OH RPQ is a TRIANGLE! oops

the pi/2 is just radians, i was using degrees. sorry if that is confusing...

no its not i understand radians

Ah, okay. :)

aha i see it, thank you very much!

You're welcome! :)