## Trigonometry

If $$\sin \theta - \cos \theta = \frac{7}{{13}}$$    and $${0^ \circ }{\text{ < }}\theta {\text{ < }}{90^ \circ }{\text{,}}$$   then the value of $$\sin \theta$$  + $${\text{cos}}\theta$$  is?
Options:
 A. $$\frac{{17}}{{13}}$$ B. $$\frac{{13}}{{17}}$$ C. $$\frac{1}{{13}}$$ D. $$\frac{1}{{17}}$$