Answer:
Step-by-step explanation:
Since and , then
Answer:
B
Step-by-step explanation:
You can see that the only difference between the three questions is the charge of the electrons. Electrons are negatively charged and so the answer is just B
Answer:
B
Step-by-step explanation:
x = -5
Put in -5 for x, and expand:
-40(k-x) = -40(k+5)
B. -40(k+5)
Answer:
1,344
Step-by-step explanation:
Multiply 224 by 6!
Hope this helps!! :))
Answer:
Choice C
Step-by-step explanation:
The quadrant in which an angle lies determines the signs of the trigonometric functions sin, cos and tan
If an angle Θ lies in quadrant IV, cos(Θ) is positive and both sin(Θ) and tan(Θ) are negative
Two of the trigonometric identities we can use are
1. and
2.
Using identity 1, we can solve for cos(s) and cos(t)
Since both angles lie in quadrant IV, both cos(s) and cos(t) must be positive so we only consider the positive signs of both values
Using identity 2, we can solve for cos(s-t)
Multiplying numerator and denominator of the first term by gives us the final expression as