SOLUTION: 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 =

Algebra ->  Trigonometry-basics -> SOLUTION: 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 =       Log On


   

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
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
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%5E2%28x%29-25=0
4cos%5E2%28x%29-1=0
%282cosx%2B1%29%282cosx-1%29=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