Verify:

sin( pie / 2 - x) = cos x

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- Aug 20th 2006, 04:12 AM^_^Engineer_Adam^_^Guysss i need help
Verify:

sin( pie / 2 - x) = cos x - Aug 20th 2006, 05:45 AMCaptainBlackQuote:

Originally Posted by**^_^Engineer_Adam^_^**

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Put , and giving:

,

but , and , so:

.

However is an even function so , hence:

.

RonL