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Trig Question - HSN forum

# Trig Question

2 replies to this topic

### #1Yan

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Posted 14 March 2007 - 02:39 PM

Hey I'm completely hopeless at these.. how would you do them?

cos(x+15) = 2/3

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### #2John

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Posted 14 March 2007 - 10:41 PM

cos(x+15) = 2/3

take the cos over to the other side to get

x+15 = cos^-1(2/3)
x+15 = 48.1897

then solve for x

x = 48.1897 - 15
x = 33.1897

x is in degrees btw

### #3Yan

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Posted 16 March 2007 - 09:49 PM

ahh... I see now!! thanks!!

"Do not be frightened of death; it is life that causes pain"

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