On solving, we get   1 = 0   &   µ1 = µ2   = + 1( - ) + µ1( + ) Since  

Introduction Q.2. What are direction cosines of a line which is equally inclined to axes ? Ans: If , , are angles, if line is equally inclined   = =     l2 + m2

Equation of planes Bisecting Angle b/w Two planes: Eq. of planes bisceting angle b/w planes, a1x + b1y + c1z + d1 = 0 and a2x + b2y + c2z + d2 = 0 is,        ...

Introduction Dumb Question: How this   lx + my + nz = P is eq. of plane ? Ans:   Since   . = P = d is eq. of plane            ...

Introduction Vector Form: Since L lies on line AB P.V. of L = P.V. of line AB              = + dr's of   ...

Illustration: Find angle b/w lines whose direction cosines are   &   . Ans:   Let be angle          cos = l1l2 + m1m2 + n1n2...

3-D GEOMETRY Introduction Three dimensional geometry developed accordance to Einsteins field equations. It is useful in several branches of science like it is useful in Electromagnetism. It is...