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If in a triangleABC , cos (A-C) cos B +...

If in a `triangleABC` , cos (A-C) cos B + cos 2 B =0 , then which of the following options is(are) correct? (where, the symbols have their usual meanings).

A

`sin^2 A + sin^2 C = 2 sin^2B`

B

`a^2,b^2` and `c^2` are in AP

C

`a^2,b^2` and `c^2` are in GP

D

sin A x sin C = `sin^2 B`

Text Solution

Verified by Experts

The correct Answer is:
A, B
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