Don't understand plzzzzz help

1 answer:

3 0

Which one because I can only answer one that’s the policy of Brainly

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victus00 [196]

the answer to this question is letter a

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3 years ago

Bad White [126]

Answer:

-2/3

Step-by-step explanation:

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AVprozaik [17]

Answer:

cos 78⁰.

Step-by-step explanation:

Use cos 2A = cos^2 A - sin^2 A

so cos^2 39 - sin^2 39 = cos (2*39) = cos 78.

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maks197457 [2]

The answer is 28.75

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Zolol [24]

Answer:

Step-by-step explanation:

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