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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