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CBSE Class 12-science Answered

If y = sec x – tan x , show that  (cos x)d2y/dx2 = y2 Explain in great detail
Asked by haroonrashidgkp | 24 Aug, 2018, 11:11: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight y equals secx plus tanx dy over dx equals secxtanx plus sec squared straight x dy over dx equals secx open parentheses secx plus tanx close parentheses dy over dx equals ysecx fraction numerator straight d squared straight y over denominator dx squared end fraction equals ysecxtanx plus secx dy over dx fraction numerator straight d squared straight y over denominator dx squared end fraction equals secx open parentheses ytanx plus dy over dx close parentheses fraction numerator straight d squared straight y over denominator dx squared end fraction equals secx open parentheses ytanx plus ysecx close parentheses fraction numerator straight d squared straight y over denominator dx squared end fraction equals ysecx open parentheses tanx plus secx close parentheses cosx fraction numerator straight d squared straight y over denominator dx squared end fraction equals straight y squared end style
 
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Answered by Sneha shidid | 28 Aug, 2018, 10:44: AM

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CBSE 12-science - Maths
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