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CBSE Class 11-science Answered

please help in this
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Asked by nitishkrnehu09 | 07 Feb, 2018, 09:52: PM
answered-by-expert Expert Answer
begin mathsize 16px style tanx plus secx equals 2 cosx
sinx over cosx plus 1 over cosx equals 2 cosx
1 plus sinx equals 2 cos squared straight x
1 plus sinx equals 2 left parenthesis 1 minus sin squared straight x right parenthesis
Put space sinx equals straight m space and space solve space quadratic space equation space you space get
left parenthesis 1 plus sinx right parenthesis left parenthesis 2 sinx minus 1 right parenthesis equals 0
rightwards double arrow sinx equals negative 1 space or space sinx equals 1 half
straight x equals fraction numerator 3 straight pi over denominator 2 end fraction space space space or space space space straight x equals straight pi over 6 comma fraction numerator 5 straight pi over denominator 6 end fraction end style
Answered by Sneha shidid | 08 Feb, 2018, 09:33: AM
CBSE 11-science - Maths
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