The matrices R = [[cos(theta), -sin(theta)], [sin(theta), cos(theta)]] and D =…
GATE · 1996 · CS · Question 2 subpartsModified — slightly modified from the official paper; see the solution
The matrices R = [[cos(theta), -sin(theta)], [sin(theta), cos(theta)]] and D = [[a, 0], [0, b]] commute under multiplication
- A.
if a = b or theta = n*pi, where n is an integer
- B.
always
- C.
never
- D.
if a cos(theta) = b sin(theta)
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