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Mathematics
Mathematics
Problem
Evaluate
lim
h
→
0
cos
(
π
3
+
h
)
−
cos
(
π
3
)
h
\displaystyle\lim_{h\to0}\frac{\cos\left(\tfrac{\pi}{3}+h\right)-\cos\left(\tfrac{\pi}{3}\right)}{h}
h
→
0
lim
h
cos
(
3
π
+
h
)
−
cos
(
3
π
)
.
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