`cos^3 1 0^(@)+cos^3 11 0^(@)+cos^3 13 0^(@)=`

cos4 0^(@)+cos2 0^(@))=3(cos1 0^(@)+sin2 0^(@)) 40 CUSOUcos 40^@ + cos 20O 4(cos310^@ + sin320^@) = 3(cos 10^@ + sin20^@)N3.1 = 4

(cos ^ (3) 21 ^ (0) + cos ^ (3) 39 ^ (@)) / (cos21 ^ (@) + cos39 ^ (@)) =

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

cos5^(0)+cos24^(0)+cos175^(0)+cos204^(0)+cos300^(@)= 1) (1)/(2) 2) 13)(3)/(2)4)2

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

The value of 3sin30^(0)-4sin^(3)30^(@)+4cos^(3)30^(0)-3cos30^(@)

Write the value of cos1^(0)+cos2^(0)+cos3^(0)++cos180^(@)

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

Show that sin70^(0)cos10^(0)-cos70^(0)sin10^(0)=(sqrt(3))/(2)