Let , missing value(_)=A
As, it is given that ,
[tex]CosA=\frac{6}{19}\\\\ Cos A=0.3158\\\\ A=72 {\text{Degree}}[/tex]
To convert the value of A into Radians,
360°=2 π Radians
[tex]1 {\text{degree}}=\frac{\pi}{180}\\\\72 {\text{Degree}} =\frac{72\times 22}{180 \times 7}\\\\=1.2571[/tex]
So, missing value to the nearest hundredth= 1.26 Radians
