Question

найдите значение выражения 2cos53/sin37 + 13

Answer 1

2cos53°/sin37° + 13 = 2cos53°/sin(90° - 53°) + 13 =2cos53°/cos53° + 13 = 2 + 13 = 15

Answer 2

$\frac{2 \cos(53°) }{ \sin(37°) } + 13 = \frac{2 \cos(90° - 37° )}{ \sin(37 °)} + 13 = \\ = \frac{2 \sin(37°) }{ \sin(37°)} + 13 = 2 + 13 = 15$