How to sketch this graph? (1 Viewer)

[wandering17]

Hi, how would i sketch the graph any of these graphs? Is there a method i can use

a) Y = cosx + sinx?

and b) Sin2x-sinx ?

Thank you

 

[VBN2470]

For the first one, use the transformation method (auxillary angle method) and you should be able to sketch a simple sine (or cosine) graph. For the second part you could sketch each graph and then subtract the corresponding co-ordinates of one graph from the other. Also sub. in points to see where the graph may intersect the axes and see if curve the periodic along certain intervals on the domain.

 

[wandering17]

For the first one, use the transformation method (auxillary angle method) and you should be able to sketch a simple sine (or cosine) graph. For the second part you could sketch each graph and then subtract the corresponding co-ordinates of one graph from the other. Also sub. in points to see where the graph may intersect the axes and see if curve the periodic along certain intervals on the domain.

Thankyou i get it now