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`        Prove that the derivative of (sec x + tan x)/(sec x - tan x) is 2cos x/(1 - sin x)2`
10 months ago

Arun
22545 Points
```							Dear student we can write it as  (sec x + tan x)2 hence its derivative = 2 (sec x + tan x) * (sec x tan x + sec2 x)  = 2 (1 + sinx )( 1 + sin x) / cos3x  =  2 (1 + sin x) / cos x ( 1- sinx)  = 2 (1 – sin2 x) / cos x ( 1 – sin x)2  = 2 cos x / (1- sin x)2 hope it helps
```
10 months ago
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### Course Features

• 51 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions