Posted by Manny on Monday, April 28, 2008 at 6:00pm.
Find two standard position primary angles in radians by solving for the unknown. "Primary angles" are those angles which exist between 0 and 2pi. As usual, use exact values in your calculations.
cosx  2cos^2x = 0

trig  Reiny, Monday, April 28, 2008 at 7:31pm
cosx(1  2cosx)=0
cosx=0 or cosx=1/2
x = pi/2, 3pi/2, pi/3, 5pi/3 (90,270,60,300º)
Answer This Question
Related Questions
 trig  Find two standard position primary angles in radians by solving for the ...
 Percalc Helppppp  keep in mind answers should be pi radians or if necessary 3 ...
 Trigononometry and plaine sperical  Find the exact values of the six ...
 precalc  How do you find coterminal angles between 0 and 2pi for angles given ...
 Math  in a 6 side polygon, the first two angles are equal. , the third angle is...
 geometry  Two angles of a quadrilateral measure 210° and 100°. The other two ...
 Math  Two parallel lines cut by a transversal can create all the following ...
 Math  Which of the following correctly lists angle pairs that have the same ...
 vertex angle  The three angles add to 180 degrees. Also , the two base angles ...
 math  Two angles of a quadrilateral measure 130° and 20°. The other two angles ...
More Related Questions