English, asked by mrflirtboy452, 5 days ago

2cos 10+ sin100 +sin1000 + sin 10000 simplifies to ???

A) cos10
B) 3cos10
C) 4cos10
D) 5cos10



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Answers

Answered by rickypeter234
1

Answer:

5cos10

Explanation:

2cos10 +sin100 +sin1000 +sin10000

By using trigeometric property

sin( 2nπ +θ)=cosθ [there n=odd]

we get

= 2cos10 +sin(90+10 )+sin(90×11+10 )+sin(90×111+10 )

= 2cos10 +cos10 +cos10 +cos10

= 5cos10

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