Posted by Janie on Sunday, January 24, 2010 at 7:04pm.
2cos^2BetaCosbeta=0 (find all solutions for the equation in the interval 0, 2 pi). I have no idea how to go about doing this. Do you isolate the beta on one side? Would you be able to show me how and I'll solve for you to check?

Trig  Damon, Sunday, January 24, 2010 at 7:12pm
cos B (2 cos B  1 )=0
cos B = 0 is one solution. That is at pi/2 and 3pi/2
cos B = 1/2 is also a solution
that is at 60 degrees and 60 degrees which is at pi/3 and 5 pi/3

Trig  Janie, Sunday, January 24, 2010 at 7:35pm
I thought cos=1/2 at 30, not 60
Answer This Question
Related Questions
 Math (Calc)  Find all solutions to the following equation on the interval 0<...
 Trig.  Can someone please help me with this? Find all solutions to the equation...
 PreCalculus  Find all solutions to the equation in the interval [0, 2pi) cos4x...
 trig  how can i find all the exact solutions to the equation : 2cos^2x + 3sinx...
 trigonometry  Find all solutions on the interval [0.2pi) A) 3sin(t)=15cos(t)...
 math  Find all solutions to the equation tan(t)=1/tan (t) in the interval 0<...
 trig  Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 ...
 math (final trig problem)  Solve for x on the interval [0,π/2): cos^3(2x...
 Precalculus  Please help!!!!!!!!!!! Find all solutions to the equation in the ...
 Mathematics  Given that 2cos^2 x  3sin x 3 = 0, show that 2sin^2 x + 3sin x +...
More Related Questions