Thursday
May 23, 2013

# Homework Help: Math C30

Posted by don on Tuesday, November 1, 2011 at 11:40pm.

using unit circle solve:
2cos sq x =1

• Math C30 - Anonymous, Wednesday, November 2, 2011 at 3:15am

2 cos(sqrt( x)) = 1 Divide both sides with 2

cos(sqrt( x)) = 1 / 2

( cos( pi / 3 ) = 1 / 2 )

So :

sqrt ( x ) = pi / 3 Square both sides

x = pi^2 / 9

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