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3 years ago

I need help withy these questions.

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

8 0

The little square means 90° and a straight line means 180° so 180 minus 68° minus 90° is 22° which leaves,
1) 112° and since you can flip 68° exacly the same on both sides it is a vertical angle which means
3)68.
4) 90°

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Step-by-step explanation:

Use the Double Angle Identity: sin 2Ф = 2sinФ · cosФ

Use the Sum/Difference Identities:

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cos(α - β) = cosα · cosβ + sinα · sinβ

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Use the Pythagorean Identity: cos²Ф + sin²Ф = 1

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Distribute: cos²2A + 2cos2A·sin2A + sin²2A

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