Question

$\cos \theta =0.5698$ $\therefore \theta =....$

• A. ${45}^o{15}^{\prime }$
• B. ${55}^o{20}^{\prime }$
• C. ${13}^o{15}^{\prime }$
• D. ${55}^o{16}^{\prime }$

Answer 1

Answer: (B)

The correct option is B ${55}^o{20}^{\prime }$

$\cos \left(x\right)=0.5698:\left[\begin{array}{cc}Radians:& x=0.96453...+2\pi n,x=2\pi -0.96453...+2\pi n\\ Degrees:& x={55.2635}^{\circ }+{360}^{\circ }n,x={360}^{\circ }-{55.2635}^{\circ }+{360}^{\circ }n\end{array}\right]$

correct option is B..