Math, asked by harshamallik07, 4 months ago

The value of cos [(n + 1)A] cos[(n + 2)A] + sin [(n + 1)A] sin[(n+2)A] is (a) cos A (b) cos A (c) sin A (d) sin A

Answers

Answered by mahavenkat48

34

Step-by-step explanation:

very difficult

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Answered by gunjalpvpg

1

Answer:

it quite very difficult

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