In a - ABC- side b is equal toA- c Cos A - a cos CB- a cos B-b cos AC- b cos C-c cos BD- None of these

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Standard XII

Mathematics

Projection Formula

In a Δ ABC, s...

Question

In a $Δ A B C$ , side b is equal to

c Cos A + a cos C

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a cos B + b cos A

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b cos C + c cos B

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None of these

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Solution

The correct option is A
c Cos A + a cos C

Projection formula

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In a ΔABC, side b is equal to

The correct option is A c Cos A + a cos C Projection formula

In a $Δ A B C$ , side b is equal to

The correct option is A
c Cos A + a cos C

Projection formula