Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 3i + 6j , v = i - j
A. 3; 3k
B. 3; -3k
C. 9; -9k
D. 9; -k
Answer: D
Mathematics
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Divide and simplify.
A. +
B. - -
C. - -
D. +
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Find the domain and the range of the relation.
A. domain: [-3] range: (-?, ?) B. domain: [-3] range: (?, -?) C. domain: (?, -?) range: [-3] D. domain: (-?, ?) range: [-3]
Mathematics
Assume that 0 < ? < ?/2. Find an expression for the indicated trigonometric function.Let x = 2 sin ? in . Find cos ?.
A.
B.
C.
D.
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Use the properties of logarithms and the logarithm property of equality to solve the logarithmic equation.log(x + 5) = log(5x + 4)
A.
B.
C.
D.
Mathematics