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- cos 12^@ + cos 84^@ + cos 132^(@) + cos 156^(@)=
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- Find the value of cos 12^(@)+cos 84^(@)+cos 156^(@)+cos 132^(@)
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- Prove that cos 12^(@) + cos 84^(@) +cos 132^(@) + cos 156^(@) =-1//2
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- cos 12^@ + cos 84^@ + cos 132^(@) + cos 156^(@)=
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- A= sin 78^(@) - sin 18^(@) + cos 132^(@) , B= cos 12^(@) + cos 84^(@) ...
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- The value of the series cos 12 ^(@) + cos 84^(@) + cos 132^(@)+cos 1...
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- cos 12^(@) + cos 84^(@) + cos 156^(@) + cos 132^(@) Find the value of
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- cos 12^circ + cos 84^circ + cos 132^circ + cos 156^circ = -1/2 అని చూప...
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- cos 12^@ + cos 84^@ + cos 156^@ + cos 132^@ Is the value of
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