"Sin θ " is _ in second quadrant and first quadrant.
Correct answer: C. Positive
- A. Negative
- B. Null
- C. Positive
- D. None of these
Explanation
In the second quadrant, sinθ is positive. This is because in the second quadrant, the y-coordinate is positive, and sinθ is defined as the ratio of the opposite side to the hypotenuse in a right-angled triangle, so it is positive in this quadrant. In the first quadrant, sinθ is also positive. In the first quadrant, both the x-coordinate and the y-coordinate are positive.
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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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