Math, asked by psnnaidu9, 1 year ago

c-bcosA/b-ccosA

ans fast plzzzz

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Answered by shivalipatro

10

Answer:

cosB/cosC

plz mark it as brainliest

psnnaidu9: how????? explanation please

shivalipatro: okay fine

shivalipatro: by the projection formula,
c=bcosA+acosB and b=ccosA+acosC
therefore, c-bcosA=acosB and b-ccosa=acosC

shivalipatro: C-bcosA/b-ccosA=cosB/cosC

shivalipatro: now please mark it as brainliest

shivalipatro: pls pls

psnnaidu9: which class are you

shivalipatro: in 10th

Answered by nithinkodipyaka

10

Answer:

Projection formula :

c = bcosA + acosB

b = ccosA + acosC

By inserting them we get

bcosA + acosB - bcosA/ csosA + acosC - cosA

=> cosB/ cosC

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