![fruitbutt77](/avatars/23536.jpg)
fruitbutt77
18.07.2019 •
Mathematics
If cos θ = -8/17 and θ is in quadrant iii, cos 2θ= and tan 2θ=
Solved
Show answers
More tips
- W Work and Career Can Skill Alone Make You a Professional?...
- C Computers and Internet How to Top Up Your Skype Account Without Losing Money?...
- H Health and Medicine How does childbirth happen: everything future mothers need to know...
- H Health and Medicine What Are the Best Vitamins? A Scientific View on Vitamin Supplements...
- A Auto and Moto How to Deregister a Car in Moscow?...
- A Auto and Moto What Is the Cost of Customs Clearance for a Car in Russia?...
- A Auto and Moto How to choose the right drive for your BMW...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- L Leisure and Entertainment Mysteries of the Name Vyacheslav Dobrynin...
- H Health and Medicine What makes Graves’ disease dangerous?...
Answers on questions: Mathematics
- M Mathematics Im confused on this one...
- M Mathematics Dinosaur fossils are too old to be reliably dated using carbon-14, which has a half-life of about 5730 years. Suppose we had a 66 million year old dinosaur fossil....
- M Mathematics Observa el siguiente paralelogramo:¿Cual es la expresión que expresa su área? Es la pregunta 15...
- P Physics Remember that a Free-Body Diagram shows only the pertinent forces acting on an object: however, when solving physics problems it is often necessary or beneficial to...
- M Mathematics If b (middle term) is negative and c (last term is positive) then what do you know about the two factors? ex. 2x^2-7x+6...
- P Physics Need help on these questions...
- M Mathematics Which of the following is a solution of z^6 = 64i?...
Ответ:
17^2 = (-8)^2 + opp^2 => 289 = 64 + |opp|^2. Then, in Q III, opp = sqrt(225) = -15.
In summary, opp = -15, adj = -8 and hyp = 17.
cos 2 theta = cos theta cos theta - sin theta sin theta, or
(cos theta)^2 - (sin theta)^2
= (-8/17)^2 - (-15/17)^2 = approx 0.221 - 0.779 = -0.558 (ans)
Review: cos 2 theta = (cos theta)^2 - (sin theta)^2
sin 2 theta = 2(sin theta)(cos theta)
2 tan theta
tan 2 theta =
1 - (tan theta)^2
Ответ:
answer is -3x/3. Since this is the inverse of the equation.