Suppose u · v = 0. Which vectors could represent u and v?
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:
D.
Step-by-step explanation:
Consider the set
This set consists of four ordered pairs.
The first numbers in these pairs are These numbers are integer numbers (not natural, because -3 is negative).
The second numbers in these pairs are These numbers are integer numbers too (not natural, because -2 is negative).
Options contain only natural and real sets, so, the first and the second numbers are real numbers and