solvefor c,5cos(2x)+sin(x)+cos(x)+6=0

解答

求解

c, 5 cos (2 x) + sin (x) + cos (x) + 6 = 0

对所有 c 为真; 5 cos (2 x) + sin (x) + cos (x) + 6 = 0

求解步骤

5 cos (2 x) + sin (x) + cos (x) + 6 = 0

两侧相等

对所有 c 为真; 5 cos (2 x) + sin (x) + cos (x) + 6 = 0

so l v e f or y, 7 y = sin^{2} (x) - 4 sin (x) + 3

tan (1 1^{\circ}) = \frac{x}{12}

so l v e f or c, cos (x) - sin (x) + 3 sin^{2} (x) - 1 = 0

so l v e f or c, sin (x) + cos (x) = cos^{2} (x)

so l v e f or a, sin (0) = \frac{a}{h}