a) \(cos^{-1}\frac{1}{\sqrt{22}}\)
b) \(cos^{-1}\frac{1}{\sqrt{6}}\)
c) \(cos^{-1}\frac{1}{\sqrt{132}}\)
d) \(cos^{-1}\frac{1}{\sqrt{13}}\)
Find the angle between two planes \(\vec{r}.(2\hat{i}-\hat{j}+\hat{k})=3\) and \(\vec{r}.(3\hat{i}+2\hat{j}-3\hat{k})\)=
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Find the angle between two planes \(\vec{r}.(2\hat{i}-\hat{j}+\hat{k})=3\) and \(\vec{r}.(3\hat{i}+2\hat{j}-3\hat{k})\)=
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