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Posted: **Wed Jul 06, 2022 1:19 pm**

: Extra Credit A Use Euler S Formula To Prove The Following Identities Recall That These Make Finding Trigonometric I 1 (18.71 KiB) Viewed 10 times

(Extra Credit) (a) Use Euler's Formula to prove the following identities. Recall that these make finding trigonometric identities much easier! COS 2 (b) Use the identities from (a) to prove els + e-iz 2 sin z cos y == sin 2 == ela-e-iz 2i sin(x+y)+sin(x - y) 2