waguihmina
Answered

Discover the answers you need at Westonci.ca, a dynamic Q&A platform where knowledge is shared freely by a community of experts. Join our platform to get reliable answers to your questions from a knowledgeable community of experts. Join our Q&A platform to connect with experts dedicated to providing accurate answers to your questions in various fields.

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

Sagot :

goldenpoo21
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
Thank you for visiting our platform. We hope you found the answers you were looking for. Come back anytime you need more information. Thanks for using our service. We're always here to provide accurate and up-to-date answers to all your queries. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.