Question

if X=r×sinA×cosc , Y= r×sinA×sinC , Z= cosA then prove that r²=X²+Y²+Z²

please answer this trigo question it is very urgent .... thanks in advance​

Answer 1

I suppose there is an error in your question. (z=rcosA, not cosA)

Step-by-step explanation: (refer to attached image)

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