The value of 25^ . 65^ + 25^ . 65^ ^270^ - cose c^220^ is?

Answer: Option A

$$\frac{\sin {25}^{\circ }.\cos {65}^{\circ }+\cos {25}^{\circ }.\sin {65}^{\circ }}{{\tan }^2{70}^{\circ }-\cos e{c}^2{20}^{\circ }}$$
$$=\frac{\sin {25}^{\circ }.\cos \left({90}^{\circ }-{25}^{\circ }\right)+\cos {25}^{\circ }.\sin \left({90}^{\circ }-{25}^{\circ }\right)}{{\tan }^2{70}^{\circ }-\text{cose}{\text{c}}^2\left({90}^{\circ }-{70}^{\circ }\right)}$$
$$\begin{array}{rl}& =\frac{{\sin }^2{25}^{\circ }+{\cos }^2{25}^{\circ }}{{\tan }^2{70}^{\circ }-se{c}^2{70}^{\circ }}\\ & =\frac{1}{-1}\\ & =-1\end{array}$$