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

Read each incomplete sentence. Choose the option with the correct word or phrase that completes the sentence. In the lesson, Maarit and her Maya ancestors grew
What is happening in the world right now? Why are people fighting with the police and burning/breaking things? Why do you think this is happening?
please help quickly !
The curve (The Load elongation) for rabbit tendon tested to failure in tension is given in the figure above. Please describe the behavior of the tendon in eac
Read the problem in the photo above
what does the polynomial pirate have as a pet From work sheet called quadratic function transformations
What motivates the speaker in sonnet and ida b wells to act heroically
Pls help I will really appreciate it
What is the factorization of the polynomial below? - x2 - 15x - 56 A. (X + 8)(x + 7) B. (x+3)(x - 7) C. -1(x+8)(x + 7) D. (-x+3)(x-7)
what three components does the ideal program combine? a: strength training aerobic exercise and stretching b: fitness strength training and aerobic exercise c: