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1. |
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? |
A. | $\frac{{17}}{{13}}$$ |
B. | $\frac{{13}}{{17}}$$ |
C. | $\frac{1}{{13}}$$ |
D. | $\frac{1}{{17}}$$ |
Answer» B. $\frac{{13}}{{17}}$$ | |