Let P (1, -2 , 5) be the foot of the perpendicular drawn from the origin to the plane \pi_1 and the same P be the foot of the perpendicular from (1, 2, -1) to the plane \pi_2. Then the acute angle between the planes \pi_1 and \pi_2 is

Correct Answer is : cos−1(19√390)

TS EAMCET 06 May 2019 Shift 1 Solved Paper

Section: Mathematics

Question : 61 of 160

Marks: +1, -0

Let P (1, -2 , 5) be the foot of the perpendicular drawn from the origin to the plane π1 and the same P be the foot of the perpendicular from (1, 2, -1) to the plane π2. Then the acute angle between the planes π1 and π2 is

cos−1(
19
√390
)
cos−1(
19
√340
)
cos−1(
19
√370
)
cos−1(
19
√350
)

Validate

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