Mohon bantuannya•^^•

Mohon bantuannya•^^•

Penjelasan dengan langkah-langkah:

a+b = 10

a = 10-b

$frac{b}{ sin(45) } = frac{a}{ sin(30) } \ frac{b}{ frac{1}{2} sqrt{2} } = frac{10 - b}{ frac{1}{2} } \ b = (10 - b) sqrt{2} \ b = 10 sqrt{2} - b sqrt{2} \ b + b sqrt{2} = 10 sqrt{2} \ b(1 + sqrt{2} ) = 10 sqrt{2} \ b = frac{10 sqrt{2} }{1 + sqrt{2} } \ = frac{10 sqrt{2} }{1 + sqrt{2} } times frac{1 - sqrt{2} }{1 - sqrt{2} } \ = frac{10 sqrt{2} - 20 }{1 - 2} \ = 20 - 10 sqrt{2}$

$= 10(2 - sqrt{2} )$