Raquel estimated 304,900,000,000 as 3 × 10^8. What error did she make?
1 answer:
The error that was made by Raquel when expressing
is that she didn't count the digit correctly, The correct digit is
- Raquel was trying to express the figure in standard form but she doesn't count the number of digit very well and that was her mistake
- Standard form helps to represent digits that are very long or short in simple form and fir conveniency sake
Therefore, the correct expression in standard form is
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Answer:
Option A. (-1, 0)
Step-by-step explanation:
In the figure attached,
Circle O is a unit circle (having radius r = 1 unit)
If a point A with central angles = θ, is lying on the circle then the coordinates of the point A will be,
x = r.cosθ
x = 1.cosθ = cosθ
and y = r.sinθ
y = 1.sinθ = sinθ
Therefore, coordinates representing the point A will be (cosθ, sinθ).
As per question the given point A is lying at P (a point having central angle θ = 180°)
Coordinates of point P will be
(x', y') → (cos180°, sin180°)
→ (-1, 0)
Therefore, Option A will be the answer.
