DEF is a right triangle. A. True B. False
2 answers:
Given <u>triangle</u> DEF with the <u>lengths</u> of all <u>sides</u>. If you want to check whether this triangle is <u>right</u>, use the <u>Pythagorean theorem</u>. The greatest side is EF, then only this side could be the hypotenuse.
Check, whether
Substitute ED=25, EF=48 and DF=27:
Since the triangle DEF is not right triangle.
Answer: correct choice is B
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Answer:
The Taylor series of f(x) around the point a, can be written as:
Here we have:
f(x) = 4*cos(x)
a = 7*pi
then, let's calculate each part:
f(a) = 4*cos(7*pi) = -4
df/dx = -4*sin(x)
(df/dx)(a) = -4*sin(7*pi) = 0
(d^2f)/(dx^2) = -4*cos(x)
(d^2f)/(dx^2)(a) = -4*cos(7*pi) = 4
Here we already can see two things:
the odd derivatives will have a sin(x) function that is zero when evaluated in x = 7*pi, and we also can see that the sign will alternate between consecutive terms.
so we only will work with the even powers of the series:
f(x) = -4 + (1/2!)*4*(x - 7*pi)^2 - (1/4!)*4*(x - 7*pi)^4 + ....
So we can write it as:
f(x) = ∑fₙ
Such that the n-th term can written as:
