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Trigonometry 7 Online
OpenStudy (anonymous):

find cos pi/16

OpenStudy (solomonzelman):

\[π=180~~~~~~~~So,\]\[\cos(π/16)~~~~~~~~~~~is~~~~same~~~~as~~~~\cos~(11.25)\]

Directrix (directrix):

From @embizze Submitted for your approval. @eqmetz http://www.enotes.com/homework-help/find-exact-value-cos-pi-16-298275

OpenStudy (anonymous):

what is wrong with my solution?

Directrix (directrix):

I think pi/16 is not equal to pi/3 - pi/4.

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