You can first use the fundamental trigonometric identity:
sin(x) ^2 + cos(x) ^2 = 1
=> cos(x) ^2 = 1 - sin(x) ^2
=> cos(x) ^2 = 1 - (-4/5)^2 = 1 - 16/25 = (25 - 16) / 25 = 9 /25
=> cos (x) = +/ - √ (9/25) = +/- 3/5
Now, analyze the sign.
In the fhird quadrant the cosine is negative, so the answer is cos(x) = - 3/5.
Answer: option C. - 3/5
Answer : 6
6(p<span>÷x) - 2x
6(6</span><span>÷3) - 2(3)
6(2) - 2(3)
12 - 6
6</span>
21 * 10
210 fingers
Answer: 210 fingers
Answer:
C
Step-by-step explanation:
C
Answer:
536 posters
Step-by-step explanation:
So the club only has $1500 to spend, you can write this down as the beginning of your equation (1500=)
Now we know that the printer charges 160 as a BASE so you should now have (1500=160)
We also know that it costs an extra $2.50 per poster. You can rewrite this as:
1500=160+2.5(x)
Now subtract 160 from both sides to get:
1340=2.5(x)
Now divide 2.5 from both sides to get x by itself:
536=x
Therefore they are able to afford 536 posters
