Answer:
Option 3 is right.
Step-by-step explanation:
Reference angle of x is obtained by either 180-x, 180+x. or 360-x depending on the posiiton of terminal whether II quadrant or iv quadrant, or iii quadrant, etc.
In whatever way we find reference angles,
cos will remain cos only and sin will remain sin only there may be only changes in sign.
Of all the ordered pairs given, we find that I, II, and Iv there is a switch over form cos to sine and sin to cos. Hence these options cannot be for reference angles.
III option is 
show that both sign and cos changed sign. This is possible only in III quadrant.
ie reference angle of orignal angle t = 180+t
SO this option is right.
Answer:
Step-by-step explanation:
300(3) + 40(3)+ 9(3)
600+120+27
747
700+40+7
not quite sure what answer you are looking for here
So it went from 30 to 35, or 5 bucks, if we take 30 to be the 100%, what is 5 off of it in percentage?
Total marks for five tests = 85 * 5 = 425
Total marks in six tests with 90% would be: 90 * 6 = 540
So, the remaining marks will be: 540-425 = 115
Student must earn 115 grade in order to reach other average score of 90%
Hope this helps!
The variable assumes a decimal value, hence it is a rational number.
<h3>What are continuous and discrete variables?</h3>
- Continuous variables: Can assume decimal values, hence they are represented by rational numbers.
- Discrete variables: Assume only countable values, such as 1, 2, 3, …, hence they are represented by whole numbers, or even integers if it can be negative.
In this problem, the time assumes a value of 0.25, which is decimal, hence it is a continuous number, that is rational.
More can be learned about classification of variables at brainly.com/question/16978770
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