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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?
 
 

Grade:11

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
7 years ago
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.

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