waguihmina
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 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

What is the equation of the line that passes through (4,3) and (-4,-1)?
In julius caesar act ii, who has a recurring dream about caesar being murdered?
What is the value of m^2 - 2mn+2^n + for m=-2 and n=4?
Brought in weapons and fabrics from Europe and sold them to warlords and
who developed the triangular theory of love? a. stern berg b. hatfield c.rubin d. asch
which is the study of the processes within living organisms?
How did the 14th and 15th amendments change the constitution?
f(x)=x^2. what is g(x)?
The base of a triangle exceeds the height by 7 meters. if the area is 7272 square meters, find the length of the base and the height of the triangle.
Which of these people is known as bringing the Jewish people together to form the Israelite kingdom? Abraham Moses David Solomon