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

"Pilgrim progress" what does the town vanity symbolize?

Dirk Nowitzki of the Dallas mavericks scored 44 points in a recent basketball game. He scored no 3-point shots, but made a number of 2-point field goals and 1-p

I have been stuck with this one, and i would like to how to solve this. In each case, determine whether line AB is parallel or perpendicular to CD. (a) A(0, 0),

4x^2-28x+49=5 solve the quadratic by completing the square

I have been stuck with this one, and i would like to how to solve this. In each case, determine whether line AB is parallel or perpendicular to CD. (a) A(0, 0),

how many times does 6 go into 312

Social needs are acquired through?

How do I make a formula for a line if they only give me the intercept and the slope

"Pilgrim progress" what does the town vanity symbolize?

what two developments in the late 1800s led to the decline of the cattle business ?