View of /trunk/webwork/system/tips.txt

    1 # tips.txt: Global "tips" file.
    2 # Tips must be separated by occurrences of "%%".
    3 # Blank lines and "#" prepended lines are ignored.
    4 
    5 
    6 On many problems WeBWorK will do simple arithmetic for you -- so for
    7 example you can enter 4*11 instead of 44.  Remember that 1/2+3 is really
    8 (1/2)+3 not 1/(2+3). Use ( )'s to make your meaning clear.
    9 
   10 %%
   11 
   12 If a space or juxtaposition (e.g. 2 3, 2 x, 2x, 2sin(3)) looks like multiplication to
   13 WeBWorK, it will be interpreted as multiplication but you can always enter
   14 2*3 or 2*x or 2*sin(3) to make your meaning clear. 
   15 
   16 %%
   17 WeBWorK will interpret sin x and sin pi (or even sinpi) as sin(x) and sin(pi)
   18 respectively but be careful since sin 2pi gets interpreted as sin(2)pi which 
   19 is really (sin(2))*pi.  I.e. functions (e.g. sin) are evaluated before any
   20 other operations. It's always safer to use parentheses when entering functions.
   21 
   22 %%
   23 
   24 On almost all problems WeBWorK will allow you to use elementary expressions
   25 such as 2^3 instead of 8, 2sin(3pi/2), ln(e^2), (2+tan(3))*(4-sin(5))^6-7/8,
   26 and sqrt(9) or 9^.5 or 9^(1/2). 
   27 
   28 %%
   29 
   30 When entering functions into WeBWorK,  use ( )'s to make your meaning clear.  
   31 For example 3sin^2(4x) is wrong. You need to enter: 3(sin(4x))^2 or 
   32 3 sin(4x)^2. Functions (such as sin(  )) are evaluated before exponents are 
   33 taken so sin(4x)^2 and (sin(4x))^2 are the same thing.