Trigonometry

Question
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. $$\frac{1}{{17}}$$

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Answer: Option A

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