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In the following match each item given u...

In the following match each item given under the Column I to its correct answer given under the Column II.
`{:(,"Column I",,"Column II"),((i),sin(x+y)sin(x-y),(a),cos^(2)x-sin^(2)y),((ii),cos(x+y)cos(x-y),(b),1-tantheta//1+tantheta),((iii),cot((pi)/(4)+theta),(c),1+tantheta//1-tantheta),((iv),tan((pi)/(4)+theta),(d),sin^(2)x-sin^(2)y):}`

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