Question 929107
Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.)
100 cos2 x − 25 = 0
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{{{100cos^2(x)-25=0}}}
{{{4cos^2(x)-1=0}}}
{{{(2cosx+1)(2cosx-1)=0}}}
cosx+1=0
cosx=-1
x=3π/2+2πn, n=any integer
or
2cosx-1=0
cosx=1/2
x=π/3+2πn,5π/3+2πn, n=any integer