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@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.The derivative of the given function (xsinx+cosx) is xcosx which turns from +ve to -ve with maxima at pi/2. Putting x=pi/2 gives f(x)=pi/2 and f(0)=1, f(pi)=-1. So the graph will increase from 1 to pi/2 abd then Decrease to -1
Thus it acquires the value 1.5 at 2 places in between.
Hmm graphs are bugging me
They do
Actually
Trigonometric and algebric graphs mixed are very weird to draw on rough
How to improve my graphing skills ?
Step wise learn karo how to make a graph
It's standard procedure
First check x and y intercepts.
Then calculate critical points
Then find the increasing or decreasing nature of the graph in different intervals
Then calculate lim fx x--> infinity and -infinity and draw a horizontal line if the value is finite
If you want rigorous practise, you could check out "Playing with Graphs", although if you are clear with graphs, it wouldn't be very benefecial :/
Ig you can skim through, its a small book.
honestly its so bad
it doesnt even have actually interesting graphs
i mean you should just do functions questions at that point
+solved @SirLancelotDuLac @Dexter
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