The cosine of an angle is negative in _ quadrants.
Correct answer: A. Second and third
- A. Second and third
- B. First and second
- C. Third and fourth
- D. None of these
Explanation
The cosine of an angle is negative in the second and third quadrants of the Cartesian coordinate system. In these quadrants, the x-coordinate is negative, leading to a negative value for cosθ.
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Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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