If / cos sin 0 / F ( ) sin cos 0 0 0 1 x x

x x x

−   =      , show that F(x) F(y) = F(x + y).

Question

If / cos sin 0 / F ( ) sin cos 0 0 0 1 x x
| x | x | x |
|---|---|---|
−   =      , show that F(x) F(y) = F(x + y).

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Question 13