Question

Решите пожалуйста !!!!!

Answer 1

$Cost = - sqrt{1 - Sin ^{2} x} = - sqrt{1 - (- frac{15}{17}) ^{2} }= - sqrt{1- frac{225}{289} }= - sqrt{ frac{64}{289} } = - frac{8}{17}$
$tgt = frac{Sint}{Cost} = frac{- frac{15}{17} }{- frac{8}{17} } = frac{15*17}{8*17} = frac{15}{8}= 1,875$
$ctgt = frac{1}{tgt} = frac{1}{ frac{15}{8} }= frac{1*8}{15} = frac{8}{15}$