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

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) (Show Source): You can put this solution on YOUR website!

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