Answer:
⅔πx³
Step-by-step explanation:
The formula for the volume of a cone is
V = ⅓πr²h
Let x = radius of base.
Then 2x = height, and
V = ⅓πx²·2x = ⅔πx³
Answer:
x-intercept=(-1,0) y-intercept =(0,-3)
Step-by-step explanation:
Answer:
The Law of Cosine : cos C = 
Step-by-step explanation:
See the figure to understand the proof :
Let A Triangle ABC with sides a,b,c,
Draw a perpendicular on base AC of height H meet at point D
Divide base length b as AD = x -b and CD = x
By Pythagoras Theorem
In Triangle BDC And In Triangle BDA
a² = h² + x² ( 1 ) c² = h² + (x-b)²
c² = h² + x² + b² - 2xb ...(. 2)
From above eq 1 and 2
c² = (a² - x²) + x² + b² - 2xb
or, c² = a² + b² - 2xb .....(3)
Again in ΔBDC
cos C = 
Or, cos C = 
∴ x= a cos C
Now put ht value of x in eq 3
I.e, c² = a² + b² - 2ab cos C
Hence , cos C =
Proved Answer
Answer:
Step-by-step explanation:
construct a semicircle with center at C and cutting line AB at D and E.
With D and E as centres draw two arcs with same radius cutting at P and Q.
Join P and Q. It is the required perpendicular.
90%=0.9
30%=0.3
115.9%=1.159
9%=0.09
7%=0.07
0.452=45.2%
0.006=0.6%
0.002=0.2%
0.05=5%
4.78=478%