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+2 votes
21.8k views
in Limit, continuity and differentiability by (54.8k points)

If y = (secx - tanx)/(secx + tanx), then dy/dx equals -

(A) 2secx (secx - tanx)2 

(B) - 2secx (secx - tanx)2 

(C) 2secx (secx + tanx)2 

(D) - 2secx( secx + tanx)2 

1 Answer

+2 votes
by (52.5k points)
selected by
 
Best answer

Answer is (B) - 2secx (secx - tanx)2

 

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