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If A = [(0,-tan(alpha//2)),(tan(alpha//2...

If `A = [(0,-tan(alpha//2)),(tan(alpha//2),0)]` and l is a `2xx2` unit matrix, prove that
`l+A(l-A)[(cosalpha,-sinalpha),(sinalpha,cosalpha)]`

A

`[(cosalpha,-sinalpha),(sin alpha,cosalpha)]`

B

`[(cosalpha,sinalpha),(-sin alpha,cosalpha)]`

C

`[(tan alpha,0),(0,tanalpha)]`

D

`[(tan alpha,0),(0,-tan alpha)]`

Text Solution

Verified by Experts

The correct Answer is:
A
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