Open Question: How do I find out the exact value of cos9pi/4?

0:20 Publicado por Flechado16

Home >All Categories > Science & Mathematics >Mathematics >Open QuestionAmb A Amb A Member since:April 14, 2011Total points:85 (Level 1)I don't know how to find out te exact value. The examples tell me that i'm supposed to add or subtract something. But how do i know what to add/subtract? Please explain in simple words.
sec 10pi/3
csc 8pi/3
sin 3pi/2Answer Question

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