The discussion focuses on calculating the direction of vector C, defined as C = A - B, where A = 3i - 6j and B = 4i - 5j. The correct calculation yields C = -1i - 1j, leading to an angle of 225 degrees when applying the arctangent function. The initial attempt incorrectly stated the angle as 45 degrees due to miscalculations in the tangent function. Proper notation and clarity in mathematical expressions are emphasized for accurate problem-solving.
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You really need to work on your notation here, the first line is missing parentheses or basis vectors for two terms, there is no equality sign between the second line and the third line, the inverse tangent function has no argument and -1/-1 is 1 and not 45.Sall1230 said:A-B =
3-4 i -6--5j
-1i -1j
Tan^-1 = -1/-1 = 45
45+180 = 225
Is this correct?