Posted by Maria on Saturday, May 11, 2013 at 11:43pm.
solve cosx= (squareroot3)/ 2 where 0 <(with a line underneath) x <(with a line underneath) 2 pie
a) how many solutions are possible?
b) in which quadrants would you find the solutions?
c) determine the related angle for the equation.
d) determine all the solutions for the equation

Grade 12 Calculus  Steve, Sunday, May 12, 2013 at 6:17am
we know that
cos π/6 = √3/2
and
cos(π±x) = cos(x)
cos(2π±x) = cos(x)

Grade 12 Calculus  helpless, Wednesday, May 15, 2013 at 4:56am
Steve is correct with the reasoning. Anyways, the answers are:
a) 2
b) I and IV
c) π/6 radians (30 degrees) and π/6 (330 degrees)
d) 2nπ ± π/6 radians (n=any integer)
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