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How do I solve x+2tanx = pi/2 (pi/2 is angle in radian for 90) using graphical method?? There are 63 or 64 solns for the value of x.?
The ans is 64 solutions, i need to know how to get it. I havent understood graphical method at all.
2 Answers
- Elizabeth MLv 76 years ago
The equation is equivalent to 2tanx=pi/2 - x.
Plot the graph of y=2tanx (x in radian measure),
and y=pi/2 - x , straight line slope -1, intercept
3.142/2=1.57.
You want the values of x where the graphs intersect.
- 6 years ago
How do you figure there are only 64 solutions?
Asking a graphing calculator to draw you a pretty but pixelated picture, so that you can guess from looking, is not a valid solution method... and any teacher teaching it is a piss poor teacher that stays away from those pesky "hard concepts" students struggle the most with.
