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| 1 : | sam | 2 | # 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. |
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