Geometryhard · Past Paper
Distance between (cos theta, sin theta) and (sin theta, -cos theta) is:
A1
Bsqrt(2)
C2
D0
✓ Correct Answer: B — sqrt(2)
D^2 = (sin - cos)^2 + (-cos - sin)^2 = sin^2 - 2sincos + cos^2 + cos^2 + 2sincos + sin^2 = 2(sin^2 + cos^2) = 2. So D = sqrt(2).
Share this question
More from Geometry
- If two circles have the same center but different radii, they are called:
- Two lines that intersect at 90 degrees are:
- What is the y-intercept of the line y = 3x - 5?
- In a triangle, if the centroid and the orthocenter coincide, the triangle must be:
- Find 'k' if the point (2, 3) lies on the line 5x + ky - 4 = 0.