Browse Questions

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

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

Can you answer this question?

Toolbox:
• $r(cos\theta+isin\theta)=r\:cis\theta$