Sketch the graph of y = 3cos(2α+∏/2) for values -2∏≤α≤2∏

Sketch the graph of y = 3cos(2α+∏/2) for values -2∏≤α≤2∏
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1 Answer

3*kosine(2x+pi/2)...

first, all sine & kosine kerv look the same, but shifted

2x...go up & down twice as fast...yu get 2 kompleet sikels in 360 deg

3*...max=3 & min=-3

offset=pi/2=90 deg, so at x=0, kosine=0...& for x=delta, kerv go DOWN
by

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