She will need to sell 18 necklaces a month to reach 1650
469=18.50t +25
444=18.50t
t=24
he bought 24 t-shirts
Let's work on the left side first. And remember that
the<u> tangent</u> is the same as <u>sin/cos</u>.
sin(a) cos(a) tan(a)
Substitute for the tangent:
[ sin(a) cos(a) ] [ sin(a)/cos(a) ]
Cancel the cos(a) from the top and bottom, and you're left with
[ sin(a) ] . . . . . [ sin(a) ] which is [ <u>sin²(a)</u> ] That's the <u>left side</u>.
Now, work on the right side:
[ 1 - cos(a) ] [ 1 + cos(a) ]
Multiply that all out, using FOIL:
[ 1 + cos(a) - cos(a) - cos²(a) ]
= [ <u>1 - cos²(a)</u> ] That's the <u>right side</u>.
Do you remember that for any angle, sin²(b) + cos²(b) = 1 ?
Subtract cos²(b) from each side, and you have sin²(b) = 1 - cos²(b) for any angle.
So, on the <u>right side</u>, you could write [ <u>sin²(a)</u> ] .
Now look back about 9 lines, and compare that to the result we got for the <u>left side</u> .
They look quite similar. In fact, they're identical. And so the identity is proven.
Whew !
Answer:
<h3>x=9 answer...</h3>
Step-by-step explanation:
- 6/x=18/27
- 162=18x
- x=162/18
- x=9
<h2>hope it helps.</h2><h2>stay safe healthy and happy..</h2>
Since there are 4 options and only 1 banana, there is a 1/4 chance he will pick a banana. I'm not sure what you mean by the last few questions? I think the sample space is an apple, pear, banana, or an orange. And the event is banana?
