化简 (3cos(t))^2

解答

化简

(3 cos (t))^{2}

9 cos^{2} (t)

求解步骤

(3 cos (t))^{2}

使用指数法则:

(a \cdot b)^{n} = a^{n} b^{n}

(3 cos (t))^{2} = 3^{2} cos^{2} (t)

= 3^{2} cos^{2} (t)

3^{2} = 9

= 9 cos^{2} (t)

\frac{64}{5}

s im pl i f y \frac{a ^{2} - 5 a + 6}{3 a - 15} \cdot \frac{6 a}{a ^{2} - a - 30} \cdot \frac{a ^{2} - 25}{2 a - 4}

s im pl i f y \frac{6}{22}

s im pl i f y \frac{6}{52}

e x p an d (mn + 8 a)^{2}