Question

could you guys help me with with a hint for this proof on limits ?

Answer 1

Im sorry i have looked at it so mant times but dont understand it

Answer 2

well L'Hopitals would make this real easy :{

Answer 3

hehehe but what would be the albegra proof

Answer 4

it prob has something to do with this

http://en.wikipedia.org/wiki/Differentiation_of_trigonometric_functions#Derivative_of_the_sine_function

Answer 5

nice i ll take a look

Answer 6

hmm yeah that has something to do with derivatives

Answer 7

hmmm

Answer 8

you've covered how to use "u" to group a set, righgt?

Answer 9

hmmm no really

Answer 10

rewrite limit as this
\[\lim_{h \rightarrow 0} \frac{\sin(a+h) - \sin a}{h}\]
where h = x-a
\[\lim_{h \rightarrow 0} \frac{\sin a \cos h + \cos a \sin h - \sin a}{h}\]
\[\lim_{h \rightarrow 0} \frac{\sin h}{h} \cos a + (\frac{\cos h -1}{h}) \sin a\]

Answer 11

ohhh i see