3 years ago

Which of the following are identities? Check all that apply.

Mathematics

2 answers:

Hatshy [7]3 years ago

5 0

Answer:

b. cos²3x - sin²3x = cos6x

if its wrong sorry

hope this helps you☺️☺️

scoray [572]3 years ago

4 0

Answer:

B and D

Step-by-step explanation:

B.cos²3x-sin²3x=cos6x ( as cos²a -sin² a = cos 2a)

D.(sinx+cosx)²=sin²x+cos²x+2sinxcosx=1+sin2x

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Which of the following are identities? Check all that apply.​

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