If `(4cos^(2)40^@-3)(3-4sin^(2)40^@)=a+b cos20^@` then find the value of `(a-b).`

4cos^(3)40^(@)-3sin50^(@)=

Suppose that P(x) is a quadratic polynomial such that P(0)=cos^(3)40^(@),P(1)=cos40^(@)sin^(2)40^(@) and P(2)=0 then find the numerical value of P(3)

4(cos^3 20^(@) + cos^(3) 40^(@))=

Suppose that P(x) is a quadratic polynomial such that P(0)=cos^3 40^@, P(1) = cos 40^@ sin^2 40^@ and P(2) =0 then find the numerical value of P(3)

(2cos40^(@)-cos20^(@))/(sin20^(@))

(2cos40^(@)-cos20^(@))/(sin20^(@))

(2cos40^(@)-cos20^(@))/(sin20^(@))=?

Given that cos20^(@)-sin20^(@)=p , then what is the value of sin 40^(@) ?

if ( cos ^(3) 20^@ + cos^(3) 40^(@))/( cos 20^@+ cos 40^(@)) = k ,then the value of k is

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