Answer:
10
Step-by-step explanation:
use pythagorean theorm
√(8^2+6^2) = 10
Answer:
•cos(s+t) = cos(s)cos(t) - sin(s)sin(t) = (-⅖).(-⅗) - (√21 /5).(⅘) = +6/25 - 4√21 /25 = (6-4√21)/25
•cos(s-t) = cos(s)cos(t) + sin(s)sin(t) = (-⅖).(-⅗) + (√21 /5).(⅘) = +6/25 + 4√21 /25 = (6+4√21)/25
cos(t) = ±√(1 - sin²(t)) → -√(1 - sin²(t)) = -√(1 - (⅘)²) = -⅗
sin(s) = ±√(1 - cos²(s)) → +√(1- cos²(s)) = +√(1 - (-⅖)²) = √21 /5
The answer I believe is the third choice.
3, -2, -7, -12
These all fit into f(n)-5=f(n+1)
Answer:
7
Step-by-step explanation:
3x8-3x3+2
24-3x3+2
24-9+2
15+2
=17
