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Please show work if possible or explain...

2007-08-31 10:51:50 · 5 answers · asked by Deutschjoe 3 in Science & Mathematics Mathematics

5 answers

This equation is continous everywhere, so all you have to do to evaluate the limit is substitute, plug in Pi/6 for x

sin(pi/6) = 1/2
e^(1/2) = 1.64872127

2007-08-31 10:57:25 · answer #1 · answered by bluemanshoe 2 · 2 0

Since pi(radians)=180 (degrees) pi(radians)/6=30 (degrees).

This defines the classical 30-60-90 degree unit triangle with sides of 1 (hypotenuse - radius on the unit circle), sqrt(3)/2 (length - cos) and 1/2 (height - sin).

Since both sinx and e^x are everywhere continuous,

lim x→pi/6 e^(sinx) = e^[lim x→pi/6 (sinx)]

Thus, from both directions,

lim x→pi/6 e^(sinx) = e^(1/2)

2007-08-31 18:16:46 · answer #2 · answered by richarduie 6 · 0 0

This is just a substitution technique! just substitute pi/6 to x in e^(sinx)

thus, Lim x-> pi/6 e^(sinx) = e^1/2.

This is actually by a theorem of continuity that states that if f is continuous, lim f(g(x)) = f(lim g(x)). i.e. the continuous function and the limit operator are interchangeable.

Thus, rigorously applying the theorem, since the exponential and trigonometric function are continuous at pi/6 (actually, everywhere), then

lim x->pi/6 exp(sin(x)) = exp(lim x->pi/6 (sin x))

= exp ( sin (lim x->pi/6 x)) = exp(sin pi/6) = exp (1/2).

2007-08-31 17:58:42 · answer #3 · answered by johnvee 3 · 0 0

Lim x→pi/6 e^(sinx)?
sin (pi/6) = .5
e^.5 = 1.6487
Lim x--> pi/6 (e^sinx) = e^.5 = approx = 1.6487

2007-08-31 18:18:29 · answer #4 · answered by ironduke8159 7 · 0 0

omg thats so easy, Lim x→pi/6 e^(sinx)=52

2007-08-31 17:55:23 · answer #5 · answered by Anonymous · 0 1

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