Wednesday, 2 July 2014

trigonometry - How does one compute cos((pi/4)(k−1))?

How to compute cos(π4(k−1)) ?

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real analysis - How to find limhrightarrow0fracsin(ha)h

How to find limh→0sin(ha)h without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...