Question

Решить
sin(2arccos3/5)

Answer 1

решение прикреплено✔✔✔✔✔✔✔✔✔✔✔

Answer 2

$sin(2arccos( frac{3}{5}))=2sin(arccos(frac{3}{5}))cos(arccos(frac{3}{5}))=2 sqrt{1-(frac{3}{5} )^{2} }*frac{3}{5}= \ =frac{6- sqrt{1-(frac{3}{5})^2 } }{5} =frac{6 sqrt{frac{16}{25} } }{5}=frac{frac{24}{5} }{5} =frac{24}{25}=0,96$