In a ABC- if c 2- a 2- b 2- ac- then - B -MP PET 1983- 89-90-A- 1-6B-C-D- None of these

The correct option is C π/3cos B = c^2 + a^2 b^2/2ac⇒ cos B = 1/2 i.e., B=π/3. ...

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General Solution of Trigonometric Equation

In a ABC, if ...

Question

In a $△$ ABC, if $c^{2} + a^{2} - b^{2} = a c,$ then $∠ B =$
[MP PET 1983, 89, 90]

\frac{π}{6}

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\frac{π}{4}

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\frac{π}{3}

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None of these

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