What is the smallest positive angle in degrees or rads for which the trig functions are equal?
Express your answer to the nearest 3 decimal points.
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That was fun; I hadn't come across that angle before. I got this on my third attempt, but one of my attempts was 0 , so you may want specify "the smallest positive angle" to avoid any potential ambiguity. I suppose the technical issue with 0 as a potential answer would be what happens with the cosecant and cotangent function as the angle(s) approach 0 . The results do in fact match in both cases, but this would involve a proof involving limits, which I don't think is what you had in mind, so it's probably easiest if you just specify the angle as being positive. :)
@Guiseppi Butel I've just tried your Problem #2, and I have a couple of questions. Technically there can be no "smallest negative angle"; I think that you might mean "the largest negative angle", or similarly "the negative angle with the least magnitude". For example, the largest negative integer is − 1 , since it is greater than all other negative integers, but it is also has the smallest magnitude, (i.e., absolute value), among negative integers.
My second question is: are you certain the answer to Problem #2 isn't - 6 . 3 9 5 ? The solution set I find is all x such that
x = 1 8 0 − π 3 6 0 ∗ n ∗ π for any integer n .
This would mean the the magnitude of the answers to the two problems would be the same. Am I missing something?
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I was debating how to frame this question . I meant the smallest in terms of its absolute value.
I'm sorry I erred in this computation. I was misled by assuming that the fact that that angle being in the 3rd quadrant affected the values. I assumed that it had to be in Quadrant4. I will make the appropriate change.
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Let x = angle
x+360 = 180/Pi*x
x=6.394795544
x=6.395