Let alphaa n dbeta be any two positive v...

Let `alphaa n dbeta` be any two positive values of `x` for which `2cosx ,|cosx|,` and `1-3cos^2x` are in G.P. The minimum value of `|alpha-beta|` is `pi/3` (b) `pi/4` (c) `pi/2` (d) none of these

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