Question

Помогите сделать до вечера!
$frac{-6}{sin^266+cos^2426}$
$frac{2}{5}-0,52* frac{5}{26}$

Answer 1

1) $-frac{6}{sin^{2}66+cos^{2}(360+66)}=-frac{6}{sin^{2}66+cos^{2}(66)}=-6$

2) $frac{2}{5}-frac{52}{100}*frac{5}{26}= frac{2}{5}-frac{2}{20}=0.4-0.1=0.3$

Answer 2

$frac{-6}{sin^266+cos ^2426} = frac{-6}{sin^2(90-24)+cos^2(450-24)} = frac{-6}{cos^224+sin^224} = frac{-6}{1} =-6$

$frac{2}{5} -0.52* frac{5}{26} =0.3$