Question

please solve this......

Answer 1

Answer:

Step-by-step explanation:

Putting the value  of x , y and z in the eq. x2+y2+z2=r2;

Now taking the LHS;

r2cos2αsin2B+r2cos2αcos2B+r2sin2α;

Now taking r2cos2α common:

r2cos2α(sin2B+cos2B)+r2sin2α;

r2cos2α+r2sin2α;

r2(cos2α+sin2α);

r2 this is equal to RHS