solvefor t,cot(x)cot^2(x)=-1

解答

求解

t, cot (x) cot^{2} (x) = - 1

对所有 t 为真; cot^{3} (x) = - 1

求解步骤

cot (x) cot^{2} (x) = - 1

化简

cot (x) cot^{2} (x) : cot^{3} (x)

cot (x) cot^{2} (x)

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

cot (x) cot^{2} (x) = cot^{1 + 2} (x)

= cot^{1 + 2} (x)

数字相加:

1 + 2 = 3

= cot^{3} (x)

cot^{3} (x) = - 1

两侧相等

对所有 t 为真; cot^{3} (x) = - 1

so l v e f or i, 1 - 2 sin^{2} (4 5^{\circ} - \frac{a}{2}) = sin (a)

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

so l v e f or c, cos^{4} (s) - sin^{4} (x) + 1 + cos (x) = 0

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

so l v e f or y, y = sin (3 t) u (t) \cdot u (t)