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`((Sin A- Sin B ))/(( Cos a Cos B )) (( Cos a - Cos B ))/(( Sina Sin B ))=0` - Mathematics | Shaalaa.com

SOLVED: Formulas: sin( A B) =sin Acos B cos Asin B sin(A - B) = sin Acos B- cos Asin B cos(A B) =cos Acos B - sin Asin B cos(A - B) =cos Acos B sin Asin B tan A tan B tan( A B) = [-tan A tan B tan A - tan B tan( A -B) I tan Atan Bcos sin A-tVl- 2sin 24 = 2sin Acos Acos 2A cos A-sin" 2cos A=1 I-2sin cos cos A=f 2 tan A tan 2, 1-tutan A= !-cos4 Or sin A sin A I cos ATt 3. Using half angle formula, Find sin] 12

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