" (iii) "(cos^(2)20^(@)+cos^(2)70^(@))/(sin^(2)59^(@)+sin^(2)31^(@))

Find the value of (cos^(2)20^(@)+cos^(2)70^(@))/(sin^(2)59^(@)+sin^(2)31^(@)) .

The value of (cos^(3)20^(@)-cos^(3)70^(@))/(sin^(3)70^(@)-sin^(3)20^(@))=?

Without using trigonometric tables,evaluate each of the following: (sin^(2)20^(@)+sin^(2)70^(@))/(cos^(2)20^(0)+cos^(2)70^(@))+(sin(90^(@)-theta)sin theta)/(tan theta)+(cos(90^(@)-theta)cos theta)/(cot theta)+cos(40^(0)+theta)-sin(50^(@)-theta)+(cos^(2)40^(0)+cos^(2)50^(@))/(sin^(2)40^(0)+sin^(2)50^(@))

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

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

Value of (sin^(2)20^(@)+cos^(4)20^(@))/(sin^(4)20^(@)+cos^(2)20^(@)) is

The value of (sin^(2)20^(@)+cos^(4)20^(@))/(sin^(4)20^(@)+cos^(2)20^(@)) is

The value of (sin^(2)20^(@)+cos^(4)20^(@))/(sin^(4)20^(@)+cos^(2)20^(@)) is

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

(cos70^(@))/(sin20^(@))+(cos59^(@))/(sin31^(@))=8sin^(2)30^(@)