evaluate tan45/sec60+cos60/cos²45 -cos30/cot45+sin60/sin90
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1/2 + 1/2 upon 1/root2*1/root2 -- root3/2 + root3/2
=1/2 + 1/1 - 0
=1/2+1
=1+2/2
=3/2
=1/2 + 1/1 - 0
=1/2+1
=1+2/2
=3/2
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