Find the Angle Between the Vectors U and V $\mathbf { u } = \cos \left( \frac { \pi } { 3 } \right) \mathbf { i } + \sin \left( \frac { \pi } { 3 } \right) \mathbf { j }$

question 29

Multiple Choice

Find the angle between the vectors u and v. $\mathbf { u } = \cos \left( \frac { \pi } { 3 } \right) \mathbf { i } + \sin \left( \frac { \pi } { 3 } \right) \mathbf { j }$ , $v = \cos \left( \frac { 3 \pi } { 4 } \right) i + \sin \left( \frac { 3 \pi } { 4 } \right) j$ ​

• A) \(40 ^ { \circ }\)
• B) \(15 ^ { \circ }\)
• C) \(75 ^ { \circ }\)
• D) \(105 ^ { \circ }\)
• E) \(70 ^ { \circ }\)

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Definitions:

Naming Speed

The rate at which an individual can name aloud objects, colors, letters, or digits, a measure often used in reading and cognitive development assessments.

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A disorder impacting learning, specifically marked by challenges in reading stemming from issues in recognizing phonetic sounds and understanding their connection to letters and words.

Possible Causes

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The gradual progression of muscle control, movement skills, and physical coordination in infants and children.