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Gurpreet singh

· started a discussion

· 1 Months ago

wrong answer (Question: 252291.0 )

correct answer is option D

Question:
If x sin \(\theta\) = y cos \(\theta\) =  \(\cfrac{2z\ tan\ \theta}{1-tan^2\ \theta}\) , then what is 4z2(x2 + y2) equal to?
Options:
A) (x2 + y2)3
B) (x2 – y2)3
C) (x2 – y2)2
D) (x2 + y2)2
Solution:

Ans: (c) 

Kokila Lakshmi

· commented

· 1 Months ago

yes.. I am also getting ans as option d oly.
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