Basic concept of trigonometric ratio

Express each of the following in terms of trigonometric ratios of angles between 0 and 45 : (i) sin81 + tan81 (ii) sin72 + cot72

STATEMENT 1 Method of dimension cannot be used for deriving formula containing trigonometrical ratios STATEMENT-2 Trigonometrical ratios have no dimension

If sintheta=3/5 , find the values of other trigonometric ratios.

If cos e cA=sqrt(10), find other five trigonometric ratios.

If cos e cA=sqrt(10), find other five trigonometric ratios.

If sintheta=(a^2-b^2)/(a^2+b^2) , find the values of other five trigonometric ratios.

Express cot 85^o +cos75^o in terms of trigonometric ratios of angles between 0^o and 45^o