sin(3*x)*cos(7*x)+cos(3*x)*sin(7*x) если x=3 (упростите выражение)

$$sin{left (3 x right )} cos{left (7 x right )} + sin{left (7 x right )} cos{left (3 x right )}$$

$$sin{left (3 x right )} cos{left (7 x right )} + sin{left (7 x right )} cos{left (3 x right )}$$

sin(3*(3))*cos(7*(3)) + cos(3*(3))*sin(7*(3))

$$sin{left (3 (3) right )} cos{left (7 (3) right )} + sin{left (7 (3) right )} cos{left (3 (3) right )}$$

sin(3*3)*cos(7*3) + cos(3*3)*sin(7*3)

$$sin{left (3 cdot 7 right )} cos{left (3 cdot 3 right )} + sin{left (3 cdot 3 right )} cos{left (3 cdot 7 right )}$$

cos(9)*sin(21) + cos(21)*sin(9)

$$sin{left (21 right )} cos{left (9 right )} + sin{left (9 right )} cos{left (21 right )}$$

cos(3*x)*sin(7*x) + cos(7*x)*sin(3*x)

sin(10*x)

$$sin{left (10 x right )}$$

$$sin{left (10 x right )}$$

sin(10*x)

$$sin{left (10 x right )}$$

/ 3 2 / 7 4 3 6 2 5 / 3 2 / 7 5 2 6 3 4
cos (x) – 3*sin (x)*cos(x)/* – sin (x) – 35*cos (x)*sin (x) + 7*cos (x)*sin(x) + 21*cos (x)*sin (x)/ + – sin (x) + 3*cos (x)*sin(x)/*cos (x) – 21*cos (x)*sin (x) – 7*sin (x)*cos(x) + 35*cos (x)*sin (x)/

$$left(- 3 sin^{2}{left (x right )} cos{left (x right )} + cos^{3}{left (x right )}right) left(- sin^{7}{left (x right )} + 21 sin^{5}{left (x right )} cos^{2}{left (x right )} – 35 sin^{3}{left (x right )} cos^{4}{left (x right )} + 7 sin{left (x right )} cos^{6}{left (x right )}right) + left(- sin^{3}{left (x right )} + 3 sin{left (x right )} cos^{2}{left (x right )}right) left(- 7 sin^{6}{left (x right )} cos{left (x right )} + 35 sin^{4}{left (x right )} cos^{3}{left (x right )} – 21 sin^{2}{left (x right )} cos^{5}{left (x right )} + cos^{7}{left (x right )}right)$$