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prove that ,{cosA+cosB/sinA-sinB}ⁿ + {sinA+sinB/cosA-cosB}ⁿ = {2cotⁿ(A-B/2) , if n is even { 0 , if n odd |
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Answer» prove that , {cosA+cosB/sinA-sinB}ⁿ + {sinA+sinB/cosA-cosB}ⁿ = {2cotⁿ(A-B/2) , if n is even { 0 , if n odd |
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