Question

In triangle ABC, angle B = 90 and angle A is double of angle C. Find AB/AC

In triangle PQR, angle P: angle Q: angle R= 1:2:3 and altitude from P to QR is 4cm. Find the perimeter of triangle PQR

In a rectangle ABCD, t is a point on AD such that triangle btc is equilateral. If BC= 4cm, find the area of ABCD​

Answer 1

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12th

Maths

Three Dimensional Geometry

Direction Cosines and Direction Ratios

Let A = (1,2,2) , B = (2,...

MATHS

Asked on December 20, 2019 bySaisha Adnaan

Let A=(1,2,2), B=(2,3,6)and C=(3,4,12). The direction cosines of a line equally inclined with OA,OB and OC , where O is the origin, are

A

21,2−1,0

B

21,21,0

C

31,3−1,31

D

31,3−1,3