" 'he value of "cos^(2)10^(@)-cos10^(@)cos50^(@)+cos^(2)50^(@)" is "

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The value of cos^(2)10^(@)-cos10^(@) cos 50^(@) + cos^(2) 50^(@) is

The value of cos^(2)10^(@)-cos10^(@)cos 50^(@)+cos^(2)50^(@) is k/2 . 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

The value of cos ^(2) 10^(@) - cos 10^(@) cos 50^(@) + cos ^(2) 50^(@) is equal to

cos^(2)10^(@)+cos^(2)50^(@)+cos^(2)70^(@)=?

The value of 16cos 10^(@) cos30^(@) cos50^(@)cos70^(@) "is"

The value of cos ^(2) 10^(@) cos 50^(@) + cos ^(2) 50^(@) is equal to

cos 10^(@) cos 30^(@) cos 50^(@) cos 70^(@) =

cos10^(0)cos30^(0)cos50^(@)cos70^(0)