ySin²63°+ySin²27°/4cos²17°+4cos²73°=-½

Asked by yashpj0067 | 16th Jun, 2019, 02:09: PM

Expert Answer:

fraction numerator y sin squared 63 plus y sin squared 27 over denominator 4 cos squared 17 plus 4 cos squared 73 end fraction equals negative 1 half
fraction numerator begin display style y sin squared 63 plus y open parentheses sin left parenthesis 90 minus 63 right parenthesis close parentheses squared end style over denominator begin display style 4 cos squared 17 plus 4 left parenthesis cos left parenthesis 90 minus 17 right parenthesis right parenthesis squared end style end fraction equals negative fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction
fraction numerator begin display style y sin squared 63 plus y cos squared 63 end style over denominator begin display style 4 cos squared 17 plus 4 sin squared 17 end style end fraction equals negative fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction
fraction numerator begin display style y open parentheses sin squared 63 plus cos squared 63 close parentheses end style over denominator begin display style 4 open parentheses cos squared 17 plus sin squared 17 close parentheses end style end fraction equals negative fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction
y over 4 equals negative 1 half
y equals negative 2

Answered by Renu Varma | 16th Jun, 2019, 07:32: PM