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:
θ=1.2 rad=68.7549°
Step-by-step explanation:
Given
- Circle of radius 5
- Arc of length 6 subtends angle of θ

⇒

θ
Therefore θ=1.2 rad
(π rad= 180°)
Therefore 1.2 rad= 68.7549°
Answer:
daw
Step-by-step explanation:
The answer is D:)
the reason why is because on September 17, 1787, the Constitution of the United States of America was signed by 38 of the 41 delegates present at the conclusion of the convention.