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January 30, 2015

Posted by **MELEK** on Monday, February 27, 2012 at 10:05pm.

answers

sec 13pi/4=? =>-(2)

csc 13pi/4=? =>-(2)

sec (-pi/6)=? =>2(3)/3

- PRE-CAL -
**Damon**, Monday, February 27, 2012 at 11:01pm13/4 = 3 1/4 = 2 + 1 1/4

so twice around + pi + pi/4

which is

45 degrees below -x axis

cos 5 pi/4 = -1/sqrt 2 so sec 5 pi/4 = -sqrt 2

the others are similar

Just remember once all the way around is 2 pi and halfway around is pi

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