quantitative aptitude test 107

Test # 107
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1. The value of cos 20 + cos 40 +cos 60+ ......+ cos 160 + cos 180 is:

Quantitative Aptitude
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cross a bridge before one comes to it
to think and worry about future events or problems before they happen
We should not worry about that problem now. We do not need to cross that bridge before we come to it.
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