SOLUTION: I need help with this equations: 2sin2x-1=0 solutions? cos^2(x)+sin(x)* cos(x)=1 equal which angles? 2sin(2x-1)=0 equal what angle? Thank you very much for your ti

Algebra ->  Trigonometry-basics -> SOLUTION: I need help with this equations: 2sin2x-1=0 solutions? cos^2(x)+sin(x)* cos(x)=1 equal which angles? 2sin(2x-1)=0 equal what angle? Thank you very much for your ti      Log On


   

Question 511183: I need help with this equations:
2sin2x-1=0 solutions?

cos^2(x)+sin(x)* cos(x)=1 equal which angles?
2sin(2x-1)=0 equal what angle?

Thank you very much for your time and for sharing your abilities
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!

2sin2x-1=0 solutions?
sin2x=1/2
2x=30º
x=15º
..
cos^2(x)+sin(x)* cos(x)=1
cos(x)(cos(x)+sin(x)=1
cos(90º)(cos(90º)+sin(90º)=0(0+1)=1
x=90º
..
2sin(2x-1)=0
sin(2x-1)=0
2x-1=0
2x=1
x=1/2