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[" (b) "cos^(2)5^(@)+cos^(2)10^(@)],[+co...

[" (b) "cos^(2)5^(@)+cos^(2)10^(@)],[+cos^(2)15^(@)+...+cos^(2)360^(@)=],[[" 1) "18," 2) "27," 3736"," 4) "45]]

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cos^(2)5^(@)+cos^(2)10^(@)+cos^(2)15^(@)+.....+cos^(2) 90^(@)=

cos^(2)5^(@)+cos^(2)10^(@)+cos^(2)15^(@)+..+cos^(2)355^(@)

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

Value of cos^(2) 5^(@) + cos^(2) 10^(@) + cos^(2) 80^(@) + cos ^(2) 85^(@) is

cos^(2)75^(0)+cos^(2)15^(0)-cos75^(0)cos15^(0)=

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

cos^(2)5^(@) +cos^(2)10^(@) + cos^(2) 15^(@) +…..+cos^(2) 85^(@) + cos^(2) 90^(@) is equal to

cos ^(2) 5^(circ)+cos ^(2) 10^(circ)+cos ^(2) 15^(circ)+….+cos ^(2) 90^(circ)=

The value of cos^(2)75^(@)+cos^(2)45^(@)+cos^(2)15^(@)-cos^(2)30^(@)-cos^(2)60^(@) is