![jesuslovesusall3](/avatars/45079.jpg)
jesuslovesusall3
12.08.2021 •
Mathematics
Can anyone help me with trig identities?
Solved
Show answers
More tips
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- S Style and Beauty How are artificial nails removed?...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Properly Use a Water Level?...
- L Legal consultation What Documents Are Required for a Russian Passport?...
- H Health and Medicine How to Treat Styes: Causes, Symptoms, and Home Remedies...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
Answers on questions: Mathematics
- M Mathematics What is the reciprocal of 2/5...
- M Mathematics Mrs. aster wants to plant a vegetable garden on a plot of land that is on the shape of a rectangle. the length of the garden is 12 feet and the area is 96 square feet. it costs $17.31...
- M Mathematics Percent change in 66 to 30 toy fed to nearest percent....
- M Mathematics What is the answer to this multiple choice question?...
- M Mathematics The area of a sail is 40 1/2 square feet. the base and the height of the sail are equal. what is the height of the sail (in feet)?...
- M Mathematics I m s confused? as soon as possible. it s do soon! i would really appreciate it....
- M Mathematics Geometry ? (see attachment) i think it is (4, 2) but not sure...
- M Mathematics Angela has 3 more dollars than half of sabrina s money. if angela has 206 dollars, how much does sabrina have? define your varieble and solve your your equation. (plz solve this with...
- M Mathematics Is 8 3/4 gallons greater than 32 qts...
- M Mathematics Avery had 125 animal stickers. she have 5 animal stickers to each of her 10 friends how many animal stickers did she have left what number sentences did you use to solve...
Ответ:
cosA = √(21/25)
Step-by-step explanation:
We know
sin²(A) + cos²(A) = 1
Next, we know that sin(A) = 2/5. Plugging that into our equation, we get
(2/5)² + cos²A = 1
4/25 + cos²A = 1
subtract 4/25 from both sides to isolate cos²A
cos²A = 1 - 4/25 = 25/25-4/25 = 21/25
square root both sides to get
cosA = √(21/25)
We do not include -√(21/25) in our possible answer for cosA because this is in quadrant 1, so cosA must be positive.
Ответ:
The stretching will come from the -2/3 x
Answer is D