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erosheaBest ResponseYou've already chosen the best response.0
\[if x+y=90, then \frac{ sinx tany }{ siny tanx } is equal \to?\]
 one year ago

hartnnBest ResponseYou've already chosen the best response.0
u want answer in terms of x or y ?
 one year ago

erosheaBest ResponseYou've already chosen the best response.0
the possible answers are a. tanx b.1/tanx c.tanx d. 1/tanx
 one year ago

ash2326Best ResponseYou've already chosen the best response.2
given \[x+y=90\] \[\frac{\sin x \tan y}{\sin y \tan x}\ \ \ \ \ \ \ =\] write all in terms of y=90x @eroshea what's sin (90x)??
 one year ago

ash2326Best ResponseYou've already chosen the best response.2
good, so sin y=sin (90x)=cos x similarly change tan y in terms of x
 one year ago

erosheaBest ResponseYou've already chosen the best response.0
that's cot y = (tan 90x)
 one year ago

ash2326Best ResponseYou've already chosen the best response.2
good so \[\frac{\sin x \tan y}{\sin y \tan x}\ \ \ \ \ \ \ =\frac{\sin x \cot x}{\cos x \tan x}\ \ \ \ \ \ \ = ?\] Can you simplify this now?
 one year ago

ash2326Best ResponseYou've already chosen the best response.2
check again, are you sure?
 one year ago

erosheaBest ResponseYou've already chosen the best response.0
what i got was cosx/sinx =cotx or 1/tanx
 one year ago
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