A) \[{{\cos }^{-1}}\left( 1/3 \right)\]
B) \[{{\sin }^{-1}}\left( 1/3 \right)\]
C) \[{{\cos }^{-1}}\left( 0.9 \right)\]
D) \[{{\sin }^{-1}}\left( 0.9 \right)\]
Correct Answer: C
Solution :
[c] From the geometry \[AD=2r;\text{ }AC=2r\cos \theta \] \[CD=2r\sin \theta \] \[AG=1.5r;\text{ GC=2r cos}\]\[\text{tan}\theta \text{=}\frac{GC}{CD}=\frac{2r\cos \theta -1.5r}{2r\sin \theta }\]You need to login to perform this action.
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