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1. ### I need help with a trigonometry question?

θ is in Q4 r = √80 = 4√5 (Pythagoras) sinθ = -8/[4√5] = [-2√5]/5 = (-2/5)√5 cosθ = 4/[4√5] = [√5]/5 secθ = 5/√5 = √5 sinθ + secθ = (1-2/5)√5 = 0.6√5 k = 0.6

2 Answers · Science & Mathematics · 28/04/2019

2. ### Math circle geometry problem?

5.62 = 2 * pi * r * 105/360 2.81 = pi * r * 15 * 7 / (15 * 24) 2.81 = pi * r * 7/24 2.81 * 24 / (7 * pi) = r r = 3.0666883891764061269295774290978 3.07 cm

2 Answers · Science & Mathematics · 17/06/2019

3. ### Trig ratios help!?

... of Circle / 2*radius Circumference = 2π*r Given r = 1 for the unit circle Given Arc Length...

1 Answers · Science & Mathematics · 16/11/2019

4. ### Math Problem Help? Circle Geometry?

Circumference is 2 *Pi * r = 2 * 3.14 * .75 = 1.5 * 3.14 = 4.71 circle has 360 degrees so the path is 85/360 percent of the circumference 85 / 360 * 4.71 = 1.11

1 Answers · Science & Mathematics · 17/06/2019

5. ### Find the area of the sector in a circle with radius of 6 cm and a central angle of 90°??

Area A = π r² ......radius r = 6 cm ......A = π (6 cm)² ......A = 36π cm² There...

5 Answers · Science & Mathematics · 16/06/2019

6. ### Calculus- Economics?

...minus cost. So when at full capacity, the revenue and costs are: R() = 150 * 460 R() = 69000 C() = 72.5 * 150 C() = 10875 For...

3 Answers · Science & Mathematics · 26/06/2019

7. ### Calculate the enthalpy of reaction for the cracking of butene, as represented by the following equation?

pisgachemist is correct in that to actually calculate the enthalpy change for this reaction using enthalpies of formation, you do need to know specifically which isomer of butene you are beginning with. If you know that, his answer is absolutely correct. There...

2 Answers · Science & Mathematics · 05/06/2019

8. ### Math Homework Help Vectors Grade 12?

... on B = -3+4(4)=13 2/ Hint: The Vector R is twice as long as the vector S ---> |R| = 2|S| ...

1 Answers · Science & Mathematics · 22/07/2019

9. ### given the term of a geometric sequence t5=405, t7=1620 find s12?

...a(n) = ar^(n - 1) Where a is the first term and r is the common ratio. We don't know these yet but have two...can have two possible values for S(12) depending on if r = -2 or r = 2.

6 Answers · Science & Mathematics · 01/06/2019

10. ### If the frictional force is the only force that causes the system to lose energy, what is the fractional change in the kinetic energy?

...positive direction. Conservation of angular momentum during the collision phase. m = mass R = Radius of disc A ρ = material density h = material thickness...

1 Answers · Science & Mathematics · 08/02/2020