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Valybalan90
a fost răspuns

cat face cos 60 de grade supra 1 plus sin de 60 de grade +1supra tg 30 de grade ??

Răspuns :

Renatemambouko
cos 60⁰  / (1+sin 60⁰) +1/tg 30⁰ =

=(1/2 ) /( 1+√3/2)   + 1/(√3/3) =
=(1/2 ) /( 1+√3/2)   + 3/√3 =
=(1/2 ) /[( 2+√3)/2]   + 3/√3 =
=1/( 2+√3) + √3 =
=(1+2√3+3)( 2+√3) =
=(2√3+4)/( 2+√3) =
=2(√3+2)/( 2+√3) = 2

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