1/3 x^(-2/3) cos (x^1/3) + 1/3(sinx)^-2/3 .cos x
Cos(x°) = (√3)/2
cos⁻¹[(√3)/2] = x°, that means x° = 30°
Answer:
The lateral area of the regular prism is 
Step-by-step explanation:
we know that
The lateral area of the regular prism is equal to

where
P is the perimeter of the base
h is the height of the prism
<em>Find the perimeter of base P</em>
-----> the regular pentagon has 5 equal sides
we have

substitute in the formula

Answer: the answer is B i think
Step-by-step explanation: