Примери за използване на To cosine на Английски и техните преводи на Български
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Is equal to cosine of 30 degrees.
Let's set f of x, f of x is equal to cosine of x.
This is equal to cosine squared a minus sine squared a.
You get x over 3 is equal to cosine of t.
Instead of drawing y is equal to cosine of x, I'm going to draw y is equal to cosine of 1/3 x.
Хората също превеждат
You get x over 3 is equal to cosine of 2t.
So adjacent over hypotenuse is equal to cosine.
So we know that u is equal to cosine of x, so let's do that.
Because tangent is really just the ratio of the sine to cosine.
But, of course, we made the substitution long ago that d is equal to cosine of x.
And of course,that's also equal to cosine of theta over sine theta.
What was our substitution that we started with?u is equal to cosine of x.
Let's make this, instead of a is equal to cosine x, let me say that-- I don't know.
But it's the same thing, so we know that cosine of minus a is equal to cosine of a.
So if we say u is equal to cosine of x, and let's take the derivative of u with respect to x.
And then we made this d is equal to cosine of x.
This whole thing is going to evaluate to cosine of angle ABC is 15 over 17 times cosine of 60 degrees is one half.
So I'm just going to graph y is equal to cosine of x.
So this is equal to cosine of 2pi, and we will have a minus sign out here, so minus cosine of 2pi over pi, minus-- what's 2 to the fourth power?
So this is the graph of y is equal to cosine of theta.
So if u is equal to cosine of x, this thing is equal to 1 over cosine of x plus c is equal to the antiderivative of our original problem, which was sin of x over cosine of x squared dx.
We want to approximate f of x is equal to cosine of access.
Let's make the substitution that a-- and I'm just picking the letter a arbitrarily--is equal to cosine of x.
Let me write this, clean this up and hopefully the pattern merges if it hasn't emerged already. f of x is equal to cosine of x is equal to-- let met get rid of the zeros-- 1 and then we have minus x squared over 2 factorial.
But if we add 1 to both sides of that equation we get 2 times the cosine squared of a is equal to cosine of 2a plus 1.
And so we have a situation where we can rewrite cosine of x is equal to the sum,if you believe that this Macloren series actually does converge to cosine of x over the entire domain of x, that's kind of an assumption we're making.
You say, look, pi is powerful because-- or one of the reasons why pi seems to have some type of mystical power, and we have shown this in the calculus playlist-- is Euler's formula,that e to the i theta is equal to cosine of theta plus i sine of theta.
Let me do this in a bold color because it deserves to be bold. e to the i pi is equal to well, where x is pi,is equal to cosine of pi plus i sin of pi.