Home
Class 12
MATHS
Let PQ and QR be diagonals of adjacent ...

Let PQ and QR be diagonals of adjacent faces of a rectangular box, with its centre at O. If `angle QOR, angle ROP and angle POQ` are `theta, phi and Psi` respectively then the value of `'costheta +cos phi+cos Psi' ` is :

Promotional Banner

Similar Questions

Explore conceptually related problems

If the sides of a triangle are in A.P. and the greater and the least angles are theta and phi respectively, then show that, 4(1-cos theta)(1-cos phi) = cos theta +cos phi

O is the centre and AB and AC are two diagonals of the adjacent faces of a rectangular box. If angles given by lfloorAOB=alpha,lfloorBOC=beta,lfloorCOA=lambda then find the value of cos alpha + cos beta + cos lambda .

If theta and phi are acute angles, sin theta=1/2, cos phi= 1/3 , then the value of (theta + phi) is:

The coordinates of O , A and B are (0,0) , (x,y) and (y,x) respectively. If angle AOB=theta, then the value of cos theta is-

The sides of triangle are in A.P. and the greatet and least angle are theta and phi: prove that 4(1-cos theta)(1-cos phi)=cos theta+cos phi

If theta and phi are positive acute angles satisfying sin theta =1/2 and cos phi =1/3, then the value of (theta + phi) lies in the interval-

In a regular tetrahedron, let theta be angle between any edge and a face not containing the edge. Then the value of cos^(2)theta is

In a regular tetrahedron, let theta be angle between any edge and a face not containing the edge. Then the value of cos^(2)theta is

If theta+phi+psi=2pi, prove that cos^2theta+cos^2phi+cos^2psi -2costheta cosphi cospsi=1

If theta+phi+psi=2pi, prove that cos^2theta+cos^2phi+cos^2psi -2costheta cosphi cospsi=1