Prove sin( x y ) / sin ( x - y )=tan x tan y / tan x -tany
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HEY!!
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▶️sin(x+y) / sin(x-y) (expand both of them)
▶️sinxcosy + cosxsiny /sinxcosy - cosxsiny
▶️( divide the whole by COSXCOSY) so we get as following
▶️(sinxcosy+cosxsiny) /cosxcosy
▶️(sinnxcosy-cosxsiny) / cosxcosy (we get)
▶️▶️tanx+tany / tanx-tany
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▶️sin(x+y) / sin(x-y) (expand both of them)
▶️sinxcosy + cosxsiny /sinxcosy - cosxsiny
▶️( divide the whole by COSXCOSY) so we get as following
▶️(sinxcosy+cosxsiny) /cosxcosy
▶️(sinnxcosy-cosxsiny) / cosxcosy (we get)
▶️▶️tanx+tany / tanx-tany
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Hello Friend....
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The answer of u r question is...
Is in the pic...
Thank you..⭐️⭐️⭐️
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