Step-by-step explanation:
Answer:I don't really know sorry but I think its the second one
Step-by-step explanation:
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
Answer:
1017.36
Step-by-step explanation:
9times 36=324
324 times pi =1017.36
Answer:
the answer is: 6z^3
Step-by-step explanation:
We need to solve this equation:
We know that 6X6 = 36
and √ = 1/2
Solving:
So, the answer is: 6z^3
