intro_to_symbol(part2)

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Unformatted text preview: Home > My Assignments > Symbolic Questions (Part 2) (Homework) About this Assignment SMALL BRIAN DIXON MA 241, section 009, Fall 2005 Instructor: Drew Pasteur North Carolina State University Due: Tuesday, August 23, 2005 11:02 PM EDT Description This assignment will Current Score: 6 out of 6 introduce you how to Question Score enter basic, advanced, and inverse trig functions as well as e, absolute values, and unusual variables. pts subs 1 1/1 1/20 1/1 Viewing: Last Response View: All Responses Notes pts subs 1 1/1 1/20 1/1 Viewing: Last Response View: All Responses Notes pts subs 1 1/1 1/20 1/1 Viewing: Last Response 1. Trigonometric functions are easy to enter in symbolic format. If you need to type something like sin(x) you would just type sin(x). It is very simple! Note: remember that you must use parentheses. You can also enter things like cos(x), tan(2x), etc. Enter the following expression using the proper notation. sin(x) + cos(2x) sin(x)+cos(2x) [sin(x) + cos(2x)] 2. To enter something like sin2(x) you need to type: sin(x)^2 or (sin(x))^2. Other examples are: cos(2x)^2, tan(4x+2)^2, and cot(6x)^2. Note: if you try to type the ^2 in the middle (for example, sin^2(x)) WebAssign will not understand your response. Enter the following expression using the proper notation. cos2(9x+6) + sin2(10x) (cos(9*x+6))^2+(sin(10x))^2 [cos(9x+6)^2 + sin(10x)^2] 3. Inverse trig functions require you to use the notation below: sin-1(x) = asin(x) cos-1(x) = acos(x) tan-1(x) = atan(x) sec-1(x) = asec(x) View: All Responses Notes csc-1(x) = acsc(x) cot-1(x) = acot(x) Note that asin(x) and sin(x)^(-1) are NOT the same thing. sin(x)^(-1) is equivalent to 1/sin(x). Enter the following expression using the proper notation. sin-1(4x) + cos-1(6x) asin(4*x)+acos(6*x) [asin(4x) + acos(6x)] pts subs 1 1/1 1/20 1/1 Viewing: Last Response View: All Responses Notes 4. You will see the exponential function (e) quite often. The notation for entering e using symbolic format is, admittedly, a bit strange. If your answer is e2 you can't just type e^2 as you might expect. Instead, you must type exp(2). Other examples are: exp(2x), exp(1), exp(4x + 6), etc. Always remember to use parentheses! Enter the following expression using the proper notation. e2 + e3x + 2 exp(2)+exp(3*x+2) [exp(2) + exp(3x+2)] pts subs 1 1/1 1/20 1/1 Viewing: Last Response View: All Responses Notes pts subs 1 1/1 1/20 1/1 Viewing: Last Response View: All Responses Notes 5. To enter the absolute value of something you will need to use the following notation: abs(2x). Other examples are: ln(abs(x)), abs(2x+4), and abs(sqrt(x)). Enter the following expression using the proper notation. ln(abs(4*x+6))+abs(x) [ln(abs(4x+6)) + abs(x)] 6. Sometimes you will be asked to use special variables such as . These types of questions always have a note indicating how to enter the variables involved. It would be worded like this: (To enter , type theta.). Note that these variables are case sensitive so you must enter it exactly as the question states it or it will be counted as incorrect (unlike INFINITY or NONE). Enter the following expression using the proper notation. (To enter , type theta.) sin(theta)+cos(theta) [sin(theta) + cos(theta)] Home My Assignments ...
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