(-7)+(-4)+7 What is the answer to this
2 answers:
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Okay, notice one thing right off the bat? 60 degrees on a right triangle (unit circle w/ terminal arm) will create the infamous 30-60-90 triangle.
We can use this to our advantage. Since sin is the y-coordinate on the unit circle. We need to solve for the longest side of a 30-60-90 triangle.
We find that the long side (y) of our 30-60-90 triangle is sqrt(3)/2. Since this is in quadrant 1, we know it is positive.
So -- sin60° = sqrt(3)/2
Answer:
1.8 in.
Step-by-step explanation:
Hi there!
<u>1) Determine the radius of the base</u>
where r is the radius of the base and h is the height of the cone
Plug in the known values (h=4.2, V=3.6)
Isolate r; divide both sides by 4.2
Multiply both sides by 3
Divide both sides by π
Take the square root of both sides
<u>2) Determine the diameter</u>
Now that we have the radius, to find the diameter, multiply r by 2:
Therefore, the diameter is 1.8 in. when rounded to the nearest tenth.
I hope this helps!