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If x = r cos a cosb cos c, y = cosa cosb sinc, z = r sina cosb  u = r sinb then x square + y square + z square + u square =

laxman , 10 Years ago
Grade 11
anser 1 Answers
Yash Baheti

Last Activity: 10 Years ago

Hi,

Follow the following steps :

Substitute the values in the expression. Observe the first term and second term carefully. If you take whatever common than this will be COMBINED one term.
Than this term will be combined with the third term and similarly with fouths term. The final answer will be r^2.

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