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[" 60.If "m tan(theta-30^(@))=n tan(thet...

[" 60.If "m tan(theta-30^(@))=n tan(theta+120^(@))" then "],[[(m+n)/(m-n)=," (B) "cos2 theta],[" (A) "2sin2 theta," (D) "sin2 theta]],[[" (C) "2cos2 theta," : "],[" (C) "20]]

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