- Electric quadrupole, find the electric field?

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Is there a powder that changes colour when exposed to a strong light-source such as a laser-pointer beam. To be used for an art project...? What is sin[arcsin(-3/2)]? Given cos(α)=−1/2 and α is in quadrant II, find the exact values of Sin α=
Cos α=
Tan α=
Csc α=
sec α=? MATH HELP????? Can someone help me find the equation to the graph below? Math help please? I cant find the equation for this graph?