Answer:
x = 5 , y = 5
Step-by-step explanation:
Using the sine and cosine ratios in the right triangle and exact values.
sin30° = , cos30° =
, then
sin30°= =
=
( cross- multiply )
2x = 10 ( divide both sides by 2 )
x = 5
and
cos30° = =
=
( cross- multiply )
2y = 10 ( divide both sides by 2 )
y = 5
Answer: 4
Step-by-step explanation:
We know that a plane is 2 dimensional surface that extends infinitely far.
The number of points required to define a plane = 3
Here , we have 4 points A, B, C, and D.
So, the number of possible combinations of 3 points to make a plane from 4 points =
[
]
Hence, the greatest number of planes determined using any three of the points A, B, C, and D if no three points are collinear = 4.
