Jika sin a + cos a = 7/3, sin a × cos a = …

By Admin ReiPosted on October 29, 2022

Jika sin a + cos a = 7/3, sin a × cos a = …

Jawaban Terkonfirmasi

$displaystyle (sin a+cos a)^2=sin^2a+2sin acos a+cos^2a\(frac{7}{3})^2=1+2sin acos a\frac{49}{9}-frac{9}{9}=2sin acos a\frac{40}{9}timesfrac{1}{2}=sin acos a\boxed{boxed{frac{20}{9}=sin acos a}}$