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If a=sin^(-1)(-(sqrt(2))/(2))+cos^(-1)(-...

If `a=sin^(-1)(-(sqrt(2))/(2))+cos^(-1)(-(1)/(2))` and `b=tan^(-1)(-sqrt(3))-cot^(-1)(-(1)/(sqrt(3)))` ,then find `a-b " and " a+b `

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