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Q)

$\large\frac{(cosx+isinx)(cosy+isiny)}{(cotu+i)(1+itanv)}=?$

(A) $=(sinv.cosu)(cos(x+y-u-v)+isin(x+y-u-v)$

(B) $=(sinu.cosv)(cos(x+y-u-v)+isin(x+y-u-v)$

(C) $=(sinu.cosv)(cos(x+y-u-v)-isin(x+y-u-v)$

(D) $=(sinv.cosu)(cos(x+y-u-v)-isin(x+y-u-v)$

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