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[" If "A=tan6^(@)tan42^(@)" and "B=cot66...

[" If "A=tan6^(@)tan42^(@)" and "B=cot66^(@)cot78^(@)," then "],[A=2Bquad " (b) "A=(1)/(3)quad " (c) "A=B-(" d) "3A=2B]

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If A=tan6^(@) tan 42^(@) and B= cot 66^(@)cot 78^(@) then-

If A=tan6^(@) tan 42^(@) and B= cot 66^(@)cot 78^(@) then-

If A=tan6^(@) tan 42^(@) and B= cot 66^(@)cot 78^(@) then-

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If tan A=(1)/(3), tan B=(2)/(7) then cot (A+B)=