waguihmina waguihmina

01-01-2021
Mathematics

contestada

how to prove that
[tex] \cos( \alpha ) = \frac{1}{2} ( {e}^{i \alpha } + {e}^{ - i \alpha } )[/tex]

Respuesta :

goldenpoo21 goldenpoo21

01-01-2021

First you need to do is solve a by simplifying both sides.
After you’ve done that you would need to keep the variable alone.
e
i
a
2
+
e
−
i
a
2
−
cos
(
a
)
=
0

Answer Link

Otras preguntas

why mathematics is the very important in a small business? is mathematics is helpful to you? explain

A fast moving car is moving on a straight road with an acceleration of 2m/s2. How much time will it require to change the velocity from 20m/s to 40m/s. Please q

George McClellan A) was an enthusiastic admirer of Abraham Lincoln B) trained the Union Arm of the Potomac to become a disciplined modern army C)was a strong su

Punctuate the following passages and rewrite them.1. the king thought for a moment then he said open all the windows a few bees which were outside the palace r

The perimeter of a rectangular plot is 36 metres. The length is 6 metres more than the width. What is the area of the rectangular plot?

Combine: “Levi Ackerman. Attack on Titan. Famous character. Fans.” A. Fans is celebrating the return of famous character Levi Ackerman in the world renowned ani

Can you help please fellow people

pls answer if it is correct i will give brainlist

Solve for x. Round to the nearest tenth, if necessary.

Constitutional and absolute monarchies are similar because both have O a democratic form of government that allows electorate control O a Parliament O monarchs