Teaching DSSSB TGT Mock Test 2025 Mathematics Differential Calculus

If f(x) = |cos x - sin x|, then f' \(\left(\frac{\pi}{3}\right) \) is equal to: 

1
\(-\left( \frac{\sqrt3 + 1}{2} \right)\)
2
\( \frac{-\sqrt3 + 1}{2} \)
3
\( \frac{\sqrt3 -1}{2} \)
4
\( \frac{\sqrt3 + 1}{2} \)
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