Question

WILL GIVE MEDAL AND FAN FOR HELP!!! Can someone please show me step by step how to do this problem?!? Picture attached below.

Answer 1

OMG...it took me forever to factor that (don't know why), but the factors come out to
(2sinA-1)(-sinA-3). Set each of those equal to 0, like this:

Answer 2

How do you factor it?

Answer 3

Hello are you still there?

Answer 4

2sinA-1=0 AND -sinA-3=0

Answer 5

I am so sorry, I got called to tutor on tutor.com and I had to take it immediately! Didn't mean to make you feel abondoned!

Answer 6

2sinA=1 when you move the -1 over, and sinA = 1/2 when you divide by the 2. So the first thing we are looking for is where the sin of A is 1/2.

Answer 7

-sin3A=0 is 0 because when you divide 0 by anything you still have 0. So the second thing we are looking for is where the sin of A = 0. Let's look into those now...

Answer 8

So if sinA = 1/2, the 1 is "the side opposite" and 2 is "the hypotenuse". Let's label our triangle now.

Answer 9

In order to find out what this triangle is, it's a "special" one, we need to find the third side.

Answer 10

Can you tell from that what angle A's measure is?

Answer 11

A is 30 degrees.

Answer 12

sinA = 0 is an angle measure of 0. So the solutions are 30 degrees and 0 degrees. Sorry again I deserted you for a bit.

Answer 13

Its all good thanks for the help!