Find, to the nearest degree, all values of theta in the interval 0° ≤ theta < 360°
that satisfy the equation 3 cos 2theta + sin theta – 1 = 0.
Last edited by mr fantastic; March 1st 2010 at 02:17 AM.
Reason: Changed post title
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enter the command: plot 3 cos(2x) + sin(2x) - 1 for x between 0 and 360 degrees
it looks like the equation has four zeros in your interval. Use your graphing calculator to approximate them.
Hello, blame_canada100! Find, to the nearest degree, all values of in the interval
that satisfy the equation: . Use the identity: .
The equation becomes: .
And we have two equations to solve: . . . .
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