The value of ( 78^ + ) - ( 12^ - ) + ( ^270^ - cose c^220^ ) 25^ 65^ + 25^ 65^ is:

Answer: Option B

$$\begin{array}{rl}& \frac{\sin \left({78}^{\circ }+\theta \right)-\cos \left({12}^{\circ }-\theta \right)+\left({\tan }^2{70}^{\circ }-\text{cose}{\text{c}}^2{20}^{\circ }\right)}{\sin {25}^{\circ }\cos {65}^{\circ }+\cos {25}^{\circ }\sin {65}^{\circ }}\\ & \frac{\sin \left({78}^{\circ }+\theta \right)-\sin \left({78}^{\circ }+\theta \right)+\left({\tan }^2{70}^{\circ }-{\sec }^2{70}^{\circ }\right)}{\sin {25}^{\circ }\sin {25}^{\circ }+\cos {25}^{\circ }\sin {25}^{\circ }}\\ & \frac{-1}{{\sin }^2{25}^{\circ }+{\cos }^2{25}^{\circ }}\\ & =-1\end{array}$$