Question

найдите значение выражения:14sin119°*cos119º/sin238°

Answer 1

$frac{14sin119 ^{0} *cos 119^{0} }{sin238 ^{0} } = frac{7*(2sin119 ^{0}*cos119 ^{0} ) }{sin238 ^{0} } = frac{7*sin(2*119 ^{0} )}{sin238 ^{0} } = frac{7*sin238 ^{0} }{sin238 ^{0} } =7$