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Find all solutions of the equation $2\cos x - 1 = 0$ The answers are A and B, where $A < B$ 

          Find all solutions of the equation $2\cos x - 1 = 0$ 
The answers are A and B, where $A < B$
Find all solutions of the equation 2cos x - 1 = 0 The answers are A and B, where A < B

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Precalculus with Limits
Precalculus with Limits
Ron Larson 2nd Edition
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Find all solutions of the equation 2cos(x) - 1 = 0. The answers are A and B, where A. Find all solutions of the equation 2cos(x) - 1 = 0. The answers are A and B, where A and B.
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Transcript

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00:03 Hello, in this question we have to find all solutions of the matrix equation c1 this matrix plus c2 this matrix plus c3 this matrix is equal to the zero matrix.
00:19 Now this matrix equation is equal to this vector equation c1 times this vector plus c2 times this vector plus c3 times this vector is equal to zero.
00:32 Now this vector equation is equivalent to this matrix equation this matrix times c1 c2 c3 if you multiply this matrix by this column vector we get c1 times the first column plus c2 times the second column c3 times the third column is equal to zero zero zero this is how these two are equivalent.
01:05 Now this matrix equation is familiar and to solve this matrix equation we will construct the or we will write the augmented matrix and row reduce it and finally we will change back to the linear system and find the value of c1 c2 c3...
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