Grade 11Differential Calculus
TMRW EXAM Sin x – cos x intevrlas in which is it is increasing or decreasing?
TMRW EXAM Sin x – cos x intevrlas in which is it is increasing or decreasing?
1 Answer
Harsh Patodia
dy/dx= cosx + sinx
In first quadrant both are positive so increasing
In second quadrant sinx is positive but cos x is negative
till 135 magnitude of sinx > cosx so it will be positive
Increasing till 135
It will be negative from 135-180 in second quadrant
Accordingly you can find for 3rd and 4th quadrant.
In first quadrant both are positive so increasing
In second quadrant sinx is positive but cos x is negative
till 135 magnitude of sinx > cosx so it will be positive
Increasing till 135
It will be negative from 135-180 in second quadrant
Accordingly you can find for 3rd and 4th quadrant.
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