= x² + y?, z = 4 - y, (2, –1, 5) (a) Find symmetric equations of the tangent line to the curve of intersection of the surfaces at the given point. (x – (y – = (z - %3D (b) Find the cosine of the angle between the gradient vectors at this point. (Give your answer correct to 3 decimal places.) cos(0) (c) Are the surfaces orthogonal at the point of intersection? Yes No

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