Answer:
B.
Step-by-step explanation:
Answer:
3x +15 = 8x
5x = 15
x = 3
Step-by-step explanation:
7 and 2 cannot be the lengths as on a triangle they're two equal side so two 3s or two 5s
2/3 and 8/12 are proportional but 3/14 and 8/28 aren’t
First, lets note that

. This leads us with the following problem:

Lets add sin on both sides, and we get:

Now if we divide with sin on both sides we get:

Now we can remember how cot is defined, it is (cos/sin). So we have:

Now take the inverse of cot and we get:

In general we have

, the reason we have to add pi times n, is because it is a function that has multiple answers, see the picture: