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