The sines of two angles of a triangle are equal to $\frac{5}{{13}}$ & $\frac{{99}}{{101}}.$ The cosine of the third angle is :
The sines of two angles of a triangle are equal to $\frac{5}{{13}}$ & $\frac{{99}}{{101}}.$ The cosine of the third angle is :
- A
$245/1313$
- B
$255/1313$
- C
$735/1313$
- D
$725/1313$
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- [IIT 1983]
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