JEE MAIN - Mathematics Hindi (2022 - 26th June Morning Shift - No. 10)
यदि दो रेखाएँ $$l_{1}: \frac{x-2}{3}=\frac{y+1}{-2}, z=2$$ तथा $$l_{2}: \frac{x-1}{1}=\frac{2 y+3}{\alpha}=\frac{z+5}{2}$$ लंबवत है, तो रेखा $$l_{2}$$ तथा $$l_{3}: \frac{1-x}{3}=\frac{2 y-1}{-4}=\frac{z}{4}$$ के बीच एक कोण है :
$$\cos ^{-1}\left(\frac{29}{4}\right)$$
$$\sec ^{-1}\left(\frac{29}{4}\right)$$
$$\cos ^{-1}\left(\frac{2}{29}\right)$$
$$\cos ^{-1}\left(\frac{2}{\sqrt{29}}\right)$$
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