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cos 1^(circ)+cos 2^(circ)+cos 3^(circ)+....

`cos 1^(circ)+cos 2^(circ)+cos 3^(circ)+...+cos 180^(circ)=`

A

1

B

2

C

2

D

-1

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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