You have new items in your feed. Click to view.
Question and answer
two types of measurement?
Inches and Feet
Get an answer
Original conversation
User: two types of measurement?





Weegy: Inches and Feet
Expert answered|sls23|Points 612|

User: where is the origin of trigonometry?

Weegy: Trigonometry was probably developed for use in sailing as a navigation method used with astronomy.[2] The origins of trigonometry can be traced to the civilizations of ancient Egypt, Mesopotamia and the Indus Valley (India), [ more than 4000 years ago.[citation needed] The common practice of measuring angles in degrees, minutes and seconds comes from the Babylonian's base sixty system of numeration. The first recorded use of trigonometry came from the Hellenistic mathematician Hipparchus[1] circa 150 BC, who compiled a trigonometric table using the sine for solving triangles. Ptolemy further developed trigonometric calculations circa 100 AD. The ancient Sinhalese in Sri Lanka, when constructing reservoirs in the Anuradhapura kingdom, used trigonometry to calculate the gradient of the water flow. Archeological research also provides evidence of trigonometry used in other unique hydrological structures dating back to 4 BC.[citation needed] The Indian mathematician Aryabhata in 499, gave tables of half chords which are now known as sine tables, along with cosine tables. He used zya for sine, kotizya for cosine, and otkram zya for inverse sine, and also introduced the versine. Another Indian mathematician, Brahmagupta in 628, used an interpolation formula to compute values of sines, up to the second order of the Newton-Stirling interpolation formula. In the 10th century, the Persian mathematician and astronomer Abul Wáfa introduced the tangent function and improved methods of calculating trigonometry tables. He established the angle addition identities, e.g. sin (a + b), and discovered the sine formula for spherical geometry: Also in the late 10th and early 11th centuries, the Egyptian astronomer Ibn Yunus performed many careful trigonometric calculations and demonstrated the formula ]
Expert answered|sls23|Points 612|

Question|Rated bad
Asked 6/21/2010 7:12:25 AM
0 Answers/Comments
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
trigonometry
Question
Updated 1/17/2014 7:40:32 AM
1 Answer/Comment
Trigonometry (from Greek trig non, "triangle" + metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles.
Added 1/17/2014 7:40:28 AM
This answer has been confirmed as correct, not copied, and helpful.
26,783,610 questions answered
Popular Conversations
Simplify -|-5 + 2| User: How many terms are in the expression shown ...
Weegy: -54 + 18 = -36 User: Simplify 3(x - 4) + 8(x + 2) User: What is the equation of the line that passes through ...
1/17/2017 1:07:03 PM| 5 Answers
3r = 10 + 5s, when r = 10?
Weegy: r(r+3) = 1 User: 5x + 2y = 20, when x = 0.3? User: What is the value of a in the equation 3a + b = 54, when b ...
1/17/2017 9:50:12 AM| 3 Answers
aphelion?
Weegy: C. [ July On July 4, 2008, our planet is at the distant end- a point astronomers call "aphelion." This puts ...
1/18/2017 1:59:28 AM| 3 Answers
All men were given the right to vote in the Fifteenth Amendment, ...
Weegy: All men were given the right to vote in the Fifteenth Amendment, and women in the Nineteenth Amendment. ...
1/17/2017 9:22:18 AM| 2 Answers
If you visit the Senate chamber during a session on an average day, ...
Weegy: Teamwork is a joint action by two or more people or a group, [ in which each person contributes with different ...
1/17/2017 11:14:47 AM| 2 Answers
How many seats in the Senate are up for election every two ...
Weegy: There are 2 pints in a quart. User: Articles 1 and 2 of the Constitution provide senators with all of these ...
1/17/2017 2:31:03 PM| 2 Answers
Solve for x. 7(x - 3) + 3(4 - x) = -8
Weegy: 7(x - 3) + 3(4 - x) = -8 4x - 9 = - 8 4x = - 8 + 9 4x = 1 x = 1/4 User: Solve for x. 7(x + 1) = ...
1/17/2017 3:10:12 PM| 2 Answers
Weegy Stuff
S
Points 308 [Total 308] Ratings 0 Comments 308 Invitations 0 Offline
S
Points 187 [Total 199] Ratings 0 Comments 187 Invitations 0 Offline
S
P
Points 176 [Total 607] Ratings 2 Comments 156 Invitations 0 Online
S
Points 85 [Total 87] Ratings 5 Comments 35 Invitations 0 Online
S
P
P
Points 62 [Total 957] Ratings 1 Comments 52 Invitations 0 Offline
S
Points 60 [Total 60] Ratings 6 Comments 0 Invitations 0 Offline
S
L
P
P
P
Points 58 [Total 4017] Ratings 0 Comments 58 Invitations 0 Offline
S
Points 24 [Total 96] Ratings 0 Comments 24 Invitations 0 Offline
S
Points 20 [Total 20] Ratings 2 Comments 0 Invitations 0 Online
S
Points 12 [Total 12] Ratings 0 Comments 12 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.