Rules for Entering Functions |
- You don't need to write the multiplication sign between a number and a variable (parentheses, function).
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| Function | It is possible to write |
| 4 * x | 4x |
| 2 * (x+1) | 2(x+1) |
- If the argument of a function is x, 2x, 3x, and so on then you don't need to write the parentheses.
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| Function | It is possible to write |
| sin(2*x) | sin2x |
| tg(4*x) | tg4x |
- In any other case, the function argument must be written in parentheses.
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| Function | You must write |
| sin(x/4) | sin(x/4) |
| tg(2x+pi/4) | tg(2x+pi/4) |
- You don't need to write the multiplication sign between a parentheses and a functions.
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| Function | It is possible to write |
| 2 * (x+1) * (x-2) | 2(x+1)(x-2) |
| 3 * (x-2) * cos2(x+pi) | 3(x-2) cos(x+pi)**2 |
| 4 * sin(2*x) * cos(x+pi)2 | 4sin2x cos((x+pi)**2) |
- The decimal fraction must be written using a dot. For example: 0.5
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- If you want to exponentiate m/n where n is odd, then you cannot use exponentiation.
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| You cannot use | You must use |
| x **(1/3) | root(3,x) |
| x **(2/3) | root(3,x**2) |
Designations
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| + - / * | addition, subtraction, division and multiplication |
| ** or ^ | exponentiation |
| root (n,x) | root of n-th degree. n = 2, 3, 4, 5 and so on. |
| pi | π |
| sin (x) | sine of x |
| cos (x) | cosine of x |
| tan (x) | tangent of x |
| cot (x) | cotangent of x |
| ln (x) | natural logarithm |
| lg (x) | decimal logarithm |
| log (n,x) | lognx n > 0 n ≠ 1 |
| exp (x) | ex |
| asin (x) | arcsine of x |
| acos (x) | arccosine of x |
| atan (x) | arctangent of x |
| acot (x) | arccotangent of x |
| abs (x) | |x| |
- If you want to draw a parametric graph the variable t is used instead of the variable x.
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- Please select t range not more than 200 pi.
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