B is conrrect because the square root of 70 is 8.3666.
To figure this out simply convert from radians to degrees and find the quadrant that you will end up, in if you move from the positive x axis. For the first one it would be 150 degrees, here you would still be at the second quadrant, since the angle is greater than 90 but less than 180.
Here tangent, is simply the opposite of the angle which is 150, divided by the adjacent, ignoring the actual values, that would be y is positive and x is negative which would mean that tangent is negative.
For the second angle measure tan 300 is in the 4th quadrant, but the y value is negative and x is positive, so tangent here is also negative.
I believe the correct option is the first one.
Answer:1:1
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Part A: Well product of two rationals is always rational. And the sum of a rational and an irrational is irrational.
They give you too much freedom in your choice though. Like for part A, what if we let b=-1 (rational) c=pi (irrational d=pi (irrational) Then bc+d = -pi + pi = 0 (rational) Maybe they didn't want you to consider 0 because otherwise all of these options can be rational.
Do you understand the difference between a rational and irrational number? Rationals can be written as a fraction containing whole numbers. Irrationals can not. Here are some examples of rational numbers: <span>3/2</span> is rational because its a whole number divided by a whole number. 7 is a rational number because it can be written as <span>7/1</span>. <span>−4</span> is a rational number, it also can be written in this form <span><span>−4/</span>1</span>. This next one maybe seem surprising, but, 0 is a rational number. It also can be written as <span>0/1</span>, but not as <span>0/0</span> (Which is not a number).
So in the end
A: <span> virtually any sum or product involving an irrational number will be irrational.
</span>B. <span>(√7)^2 = 7 ... rational
</span>C. <span>all numbers involved are rational, so this result is rational</span>