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Help Me quick my cousin needs to get this done I’ll give you 10 extra points for who ever picked the correct answer please and thank you!

Help Me quick my cousin needs to get this done I’ll give you 10 extra points for who-example-1
User Modig
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1 Answer

2 votes

Answer:

A.
\cos \: x - 4 \: \cos \: x \: { \sin}^(2)x (first option)

Explanation:

➡️
\cos(x + 2x)

➡️
\cos \: x \: { \cos}^(2) x - \sin \: x \: { \sin }^(2) x

➡️
\cos \: x(1 - 2 \sin^(2)x) - \sin \: x * 2 \sin(x) \cos(x)

➡️
\cos(x) - 2 \sin^(2) x \cos(x) - 2 \sin^(2) x \cos(x)

➡️
\cos(x) - 4 \cos(x) \sin^(2) x

User Winterized
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