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 #4
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+5

@geno3141

Hmm still no luck. I'm not sure why you'd also get a negative 1.107? 

It doesn't give the correct answer though.

2x + 0.464 = -1.107

2x = -1.571

x = -.7855 

We are supposed to be getting 2.36 :(

Apr 10, 2015
 #2
avatar
+5

@geno3141

You missed the square root in front of the equation, so with it, what I got was:

2x + 0.464 = cos^-1 (1 / sqrt5)

2x + 0.464 = 1.107

2x = 0.643

x = 0.322 

Even if you add pi to this answer, you don't get the next solution. So where does 2.36 come from? :(

Apr 10, 2015

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