if cos x= 3cos y then 2tan (y-x)/2 is equal to in form of cot

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Arun · Answer

Dear student write it as cosx/cosy = 3/1 now apply componendo and dividendo (cosx+cosy)/(cosx – cosy)= (3+1)/(3-1) now apply formulae for cosx+cosy and cosx – cosy 2tan(y – x)/2= cot(x+y)/2 Hope it helps

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if cos x= 3cos y then 2tan (y-x)/2 is equal to in form of cot

if cos x= 3cos y then 2tan (y-x)/2 is equal to
in form of cot

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if cos x= 3cos y then 2tan (y-x)/2 is equal to in form of cot

if cos x= 3cos y then 2tan (y-x)/2 is equal to in form of cot

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if cos x= 3cos y then 2tan (y-x)/2 is equal to
in form of cot