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If 2tanalpha=3t a nbeta,t h e ntan(alpha...

If `2tanalpha=3t a nbeta,t h e ntan(alpha-beta)=` `(sin2beta)/(5-cos2beta)` (b) `(cos2beta)/(5-cos2beta)` (c) `(sin2beta)/(5+cos2beta)` (d) none of these

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