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if f(alpha,beta)=|[cos alpha,-sin alpha,...

if `f(alpha,beta)`=`|[cos alpha,-sin alpha,1],[sin alpha,cos alpha,1],[cos(alpha+beta),-sin(alpha+beta),1]|` then
(a) `f(300 , 200)=f(400 , 200)`
(b) `f(200 , 400)=f(200 , 600)`
(c) `f(100 , 200)=f(200 , 200)`
(d)none of these

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