Hello :
sin<span>θ = 15/17
</span> use pythagorean identity : cos²θ +sin² θ = 1
cos²θ = 1 - sin² θ
cos²θ = 1-(15/17)²
cos²θ = 1- 225/289
cos²θ = 64/289
cos²θ = (8/17)²
cosθ = 8/17 or -8/17
Answer:
105°, 75°, and 105°.
Step-by-step explanation:
If two straight paths intersect at a point , four angles will be formed.
These are pairs of vertical angles.
The adjacent angles add up to 180°
If one of the angles is 75°, the supplement will be
Therefore the three other angles will be , 105°, 75°, and 105°.
Answer:
-2
Step-by-step explanation:
The numbers belongs to the following number sets
1. -15 belongs to integers
2. 11 belongs to prime
3. rational number
4. rational number
5. composite number
6. whole number
7. Integers
8. whole numbers
9. rational numbers
10. whole numbers
11. Integers
12. rational number
13. rational number
14. rational number
15. whole number
16. integer
17. integer
18. whole number
19. integer
What are Number sets?
Number sets can be defined as group of numbers that have definite structural properties.
The sets of numbers given above has various properties which enabled its identification. Number sets can be integers, whole numbers, real numbers, complex numbers and many more.
In conclusion, the properties of each numbers enables us to identify its set.
Learn more about Number Sets: brainly.com/question/1871587
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