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Find the slope of the tangent line to the parametric curve {x=4cos(t)y=3sin(t) at the point where t=π4.
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Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
-0.75