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| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 9 months |
| seen | 8 hours ago | |
| stats | profile views | 325 |
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Oct 20 |
asked | How to find the values of $m$ so $A \cap B = \emptyset$ and $A \cup B = (-3,+\infty)$? |
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Oct 20 |
revised |
How to transform the result of this integral into powers of $\sin\,x$? added 18 characters in body |
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Oct 19 |
answered | How to prove an expression by method of mathematical induction? |
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Oct 19 |
accepted | How to prove an expression by method of mathematical induction? |
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Oct 19 |
comment |
How to prove an expression by method of mathematical induction? I want to prove that step - by - step. |
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Oct 19 |
asked | How to prove an expression by method of mathematical induction? |
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Oct 19 |
awarded | Critic |
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Oct 19 |
accepted | How to receive the result of the integral $ \int\frac{1}{x}dx$ is $\ln|x|$? |
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Oct 19 |
asked | How to receive the result of the integral $ \int\frac{1}{x}dx$ is $\ln|x|$? |
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Oct 18 |
comment |
How to transform the result of this integral into powers of $\sin\,x$? I want the ansewr is $\ln\left|1 + \tan\dfrac{x}{2}\right| |
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Oct 18 |
comment |
How to transform the result of this integral into powers of $\sin\,x$? In general, how to calculate the given integral? Please help me. |
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Oct 18 |
comment |
How to transform the result of this integral into powers of $\sin\,x$? Your answer does not contain absolute value. I do not understand. |
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Oct 18 |
revised |
How to transform the result of this integral into powers of $\sin\,x$? added 547 characters in body |
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Oct 17 |
comment |
How to transform the result of this integral into powers of $\sin\,x$? With trigSet[Cos[x]^4 - Cos[x/2]^2, cos], I get \!(* TagBox[ RowBox[{"{", RowBox[{"1", "-", RowBox[{"9", " ", SuperscriptBox[ RowBox[{"Cos", "[", FractionBox["x", "2"], "]"}], "2"]}], "+", RowBox[{"24", " ", SuperscriptBox[ RowBox[{"Cos", "[", FractionBox["x", "2"], "]"}], "4"]}], "-", RowBox[{"32", " ", SuperscriptBox[ RowBox[{"Cos", "[", FractionBox["x", "2"], "]"}], "6"]}], "+", RowBox[{"16", " ", SuperscriptBox[ RowBox[{"Cos", "[", FractionBox["x", "2"], "]"}], "8"]}]}], "}"}], HoldForm]) |
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Oct 17 |
accepted | How to transform the result of this integral into powers of $\sin\,x$? |
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Oct 17 |
comment |
How to transform the result of this integral into powers of $\sin\,x$? I am sorry when I ask the question. |
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Oct 17 |
revised |
How to transform the result of this integral into powers of $\sin\,x$? added 1 characters in body |
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Oct 17 |
asked | How to transform the result of this integral into powers of $\sin\,x$? |
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Oct 8 |
awarded | Enthusiast |
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Oct 6 |
comment |
Reduce an equation by putting a new variable This method can be use to solve the system of the equations. For example \begin{equation*} \begin{cases} x^3 + y^3 = 2,\\ x^2 + y^2 -3xy=-1. \end{cases} \end{equation*} f[x_, y_] := x^3 + y^3 Eliminate[{f[x, y] == 2 // PowerExpand, x + y == S, x*y == P}, {x, y}] g[x_, y_] := x^2 + y^2 - 3*x*y Eliminate[{g[x, y] == -1 // PowerExpand, x + y == S, x*y == P}, {x, y}] |
