Plz solve 27 i dont know componendo and dividendo rule Share with your friends Share 0 Ankita Agarwal answered this Dear Student, Given :cosec A + cot A=m L.H.Sm2-1m2+1putting value of m = cosec A + cot A2-1 cosec A + cot A2+1= cosec2 A + cot2 A+2cotA cosecA-1 cosec2 A + cot2 A+2 cotA cosec A+1 a+b2=a2+b2+2ab=cosec2 A-1 + cot2 A+2cotA cosecAcosec2 A + cot2 A+1+2 cotA cosec A =cot2A + cot2 A+2cotA cosecAcosec2 A +cosec2A+2 cotA cosec A cosec²A-1=cot²A and cot²A+1=cosec²A=2cot2 A+2cotA cosecA2cosec2A+2 cotA cosec A=2cot AcotA+ cosecA2cosecA cotA+ cosec A=cotAcosecA=cosAsinA1sinA=cosAR.H.SHence L.H.S=R.H.S proved Regards 1 View Full Answer
