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A(theta)=[(cos^2theta,costhetasintheta),...

`A(theta)=[(cos^2theta,costhetasintheta),(costhetasintheta,sin^2theta)] and C(theta,phi)=A(theta)A(phi)`, then which of the following matrices is a null matrix?

A

`C((2pi)/(5),-(11pi)/(10))`

B

`C((11pi)/(10),-(2pi)/(5))`

C

`C((3pi)/(7),-(41pi)/(14))`

D

`C((7pi)/(3),-(29pi)/(6))`

Text Solution

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The correct Answer is:
A, B, C, D
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