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Two waves traveling together along the same line are given by E1=4.00cos(π/4-ωt) and E2=5.00cos(π-ωt) , each...

Two waves traveling together along the same line are given by

E1=4.00cos(π/4-ωt) and E2=5.00cos(π-ωt) , each with the same angular frequency. Write the form of the resultant wave ER due to the superposition of the two waves. You’ll need to find ER’s amplitude and phase angle.

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