Consider a triangular plot ABC with |Trigonometric Functions

JEE Main 2019

10-01-2019 S1

Question

Consider a triangular plot ABC with sides AB = 7 m, BC = 5 m and CA = 6 m. A vertical lamp-post at the mid point D of AC subtends an angle 30° at B. The height (in m) of the lamp-post is

Select the correct option:

$2 \sqrt{21}$

$7 \sqrt{3}$

$\frac{2}{3} \sqrt{21}$

$\frac{3}{2} \sqrt{21}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Medium

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