Find the length (magnitude) of a function gradient = (x,y) = 2+sin(x)- at the point P(z,...

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Find the length (magnitude) of a function gradient = (x,y) = 2+sin(x)- at the point P(z, 1). Present your answer in the exact form and calculate it then up to three decimal places. Find the directional derivative of the function z(x, y) = e*tan(y)+(x+1)sin(2y) at the point P(0, 7/4) in the direction of vector a = i + j3. Present your answer in the exact form (don't use a calculator). Find the directional derivative of the function z(x,y) = ln(xy) - sin(x - y) at the point P(/4,-/4) in the direction making angle 7/3 with the horizontal axis. Present your answer up to three significant figures. Find the length (magnitude) of a function gradient = (x,y) = 2+sin(x)- at the point P(z, 1). Present your answer in the exact form and calculate it then up to three decimal places. Find the directional derivative of the function z(x, y) = e*tan(y)+(x+1)sin(2y) at the point P(0, 7/4) in the direction of vector a = i + j3. Present your answer in the exact form (don't use a calculator). Find the directional derivative of the function z(x,y) = ln(xy) - sin(x - y) at the point P(/4,-/4) in the direction making angle 7/3 with the horizontal axis. Present your answer up to three significant figures.