Question on: JAMB Mathematics - 1999
Evaluate: (\int^{z}_{0}(sin x - cos x) dx \hspace{1mm}
Where\hspace{1mm}letter\hspace{1mm}z = \frac{\pi}{4}. (\pi = pi))
A
\(\sqrt{2 +1}\)
B
\(\sqrt{2 }-1\)
C
\(-\sqrt{2 }-1\)
D
\(1-\sqrt{2}\)
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Correct Option: B
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