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CBSE Class 10 Answered

If 5x sec and 5/x = tan theta find the value of 5(xsquare-1/xsquare)
Asked by DG | 16 Feb, 2018, 06:30: PM
answered-by-expert Expert Answer
begin mathsize 16px style 5 straight x equals secθ space and space 5 over straight x equals tanθ We space know space that sec squared straight theta minus tan squared straight theta equals 1 open parentheses 5 straight x close parentheses squared minus open parentheses 5 over straight x close parentheses squared equals 1 25 straight x squared minus 25 over straight x squared equals 1 25 open parentheses straight x squared minus 1 over straight x squared close parentheses equals 1 5 cross times 5 open parentheses straight x squared minus 1 over straight x squared close parentheses equals 1 5 open parentheses straight x squared minus 1 over straight x squared close parentheses equals 1 fifth end style
Answered by Sneha shidid | 16 Feb, 2018, 06:35: PM

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CBSE 10 - Maths
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