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\( \frac {1 – cot \, 45^{\circ}}{1+ cot \, 45^{\..
1.
\( \frac {1 – cot \, 45^{\circ}}{1+ cot \, 45^{\circ}}\) is _____
A.
0
B.
2
C.
3
D.
1
Answer» B.
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