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cos^(3)10^(0)+cos^(3)110^(0)+cos^(3)130^...

cos^(3)10^(0)+cos^(3)110^(0)+cos^(3)130^(0)=

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cos^(3)10^(@)+cos^(3)110^(@)+cos^(3)130^(@)=?

cos^(3)110^(@)+cos^(3)10^(@)+cos^(3)130^(@)=

cos ^(3) 110 ^(@) + cos ^(3) 10^(@) + cos ^(3) 130^(@)=

cos ^(3) 110 ^(@) + cos ^(3) 10^(@) + cos ^(3) 130^(@)=

If (cos^(3)20^(0)+cos^(3)40^(0))/(cos20^(0)+cos40^(0))=k , then the value of k is

The value of cos^(2)10^(0)-cos10^(0)cos50^(@)+cos^(2)50^(@) is equal to (4)/(3)(b)(1)/(3)(c)(3)/(4)(d)3

Prove that cos^(3)A+cos^(3)(120^(@)+A)+cos^(3)(240^(0)+A)=(3)/(4)cos3A

Prove the following identity: 4(cos^(3)10^(0)+sin^(3)20^(@))=3(cos10^(0)+sin20^(@))

Prove that cos 10^(@) + cos 110^(@) + cos 130^(@) = 0

Show that cos 10^(@) + cos 110^(@) + cos 130^(@) = 0