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Geometry MATH PROBLEMS?
write the vector 11<30 degrees in a rectangular form
is this the answer 11cos30=9.52
11 sin30=5.5
sqaureroot 9.52^2+5.5^2=10.99
The circumference of the base of a right circular cone is 40m and the slant height is 38m. what is the area of the lateral surface?
is this the answer 38m/2=19m
1 Answer
- Robert_WLv 51 decade agoFavorite Answer
The numbers are correct on #1
X = 9.53, y = 5.5 (The fact that the square of the sum sides doesn’t = 11 is round-off error)
I’m more used to seeing in the form a+jb = 9.53+j5.5
We have a disconnect on #2
C = 2pi(r) = 40
r = 40/2(pi)
Lateral surface area = pi(r)S
S = 38
A = pi(40/2(pi))S = 20S= 760