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# Graphs watch

1. you are given the sketch of y=|x| and y=|sin2x|

how can you use this to find out the number of times y =|sin2x|-|x| intersects the x=axis in the interval -90≤x≤90

i worked out the answer by plotting y =|sin2x|-|x| on a graph sketcher but is there a different way
2. (Original post by man111111)
you are given the sketch of y=|x| and y=|sin2x|

how can you use this to find out the number of times y =|sin2x|-|x| intersects the x=axis in the interval -90≤x≤90

i worked out the answer by plotting y =|sin2x|-|x| on a graph sketcher but is there a different way
Well, the question is the same as asking "How many solutions are there to the equation in the interval "

So, just look at the sketches of both functions - how many times do they intersect in that region?
3. (Original post by RDKGames)
Well, the question is the same as asking "How many solutions are there to the equation in the interval "

So, just look at the sketches of both functions - how many times do they intersect in that region?
thanks for your help

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