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If the angles A lt B lt C of a triangle ...

If the angles `A lt B lt C` of a triangle are in A.P, then

A

`c^(2) = a^(2) + b^(2) + ab`

B

`b^(2) = a^(2) + c^(2) - ac`

C

`c^(2) = a^(2) + b^(2)`

D

None of these

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The correct Answer is:
B
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DISHA PUBLICATION-SEQUENCES AND SERIES -EXERCISE -1 : Concept Builder
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