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CBSE Class 10 Answered

if sin a =3/5,find cos a and tan a
Asked by Battulasirichanda | 16 May, 2020, 03:21: PM
answered-by-expert Expert Answer
Given: sin a = 3/5
Using square trigonometric identity cos2a+sin2a=1
cosa equals square root of 1 minus sin squared straight a end root equals square root of 1 minus open parentheses 3 over 5 close parentheses squared end root equals square root of 1 minus 9 over 25 end root equals square root of 16 over 25 end root equals 4 over 5 tana equals sina over cosa equals fraction numerator begin display style 3 over 5 end style over denominator begin display style 4 over 5 end style end fraction equals 3 over 4
Answered by Renu Varma | 17 May, 2020, 09:31: PM

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