Higher Engineering Mathematics by B.S. Grewal: Solution Manual
Introduction
Higher Engineering Mathematics is a comprehensive textbook that provides in-depth coverage of mathematical concepts essential for engineering students. The book, written by B.S. Grewal, has been a popular resource for students and professionals alike. This solution manual aims to provide step-by-step solutions to selected exercises from the book.
Chapter 1: Differential Equations
1.1 Find the general solution of the differential equation:
dy/dx = 2x
Solution:
The general solution is given by:
y = ∫2x dx = x^2 + C
where C is the constant of integration.
1.2 Solve the differential equation:
dy/dx = 3y
Solution:
The general solution is given by:
y = Ce^(3x)
where C is the constant of integration.
Chapter 2: Integral Calculus
2.1 Evaluate the integral:
∫(2x^2 + 3x - 1) dx
Solution:
∫(2x^2 + 3x - 1) dx = (2/3)x^3 + (3/2)x^2 - x + C
where C is the constant of integration.
2.2 Find the area under the curve:
y = x^2 + 2x - 3
from x = 0 to x = 2.
Solution:
The area under the curve is given by:
A = ∫[0,2] (x^2 + 2x - 3) dx = [(1/3)x^3 + x^2 - 3x] from 0 to 2 = (1/3)(2)^3 + (2)^2 - 3(2) - 0 = 8/3 + 4 - 6 = 2/3
Chapter 3: Vector Calculus
3.1 Find the gradient of the scalar field:
f(x, y, z) = x^2 + y^2 + z^2
Solution:
The gradient of f is given by:
∇f = (∂f/∂x)i + (∂f/∂y)j + (∂f/∂z)k = 2xi + 2yj + 2zk
3.2 Evaluate the line integral:
∫[C] (x^2 + y^2) ds
where C is the curve:
x = t, y = t^2, z = 0
from t = 0 to t = 1.
Solution:
The line integral is given by:
∫[C] (x^2 + y^2) ds = ∫[0,1] (t^2 + t^4) √(1 + 4t^2) dt
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