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.
19,260,873 questions answered
Popular Conversations
Which of the following sentences is written in the passive voice? ...
Weegy: The sentence with the active voice is: The chairman told me that the legislature passed the bill. User: ...
1/31/2015 11:17:44 AM| 2 Answers
How long was George Washington a president?
Weegy: George Washington (February 22, 1732 [O.S. February 11, 1731] ? December 14, 1799) was the first President of ...
1/31/2015 1:03:26 AM| 1 Answers
Weegy Stuff
S
1
L
L
Points 36 [Total 7102]| Ratings 1| Comments 26| Invitations 0|Offline
S
L
P
L
P
Points 36 [Total 6811]| Ratings 0| Comments 36| Invitations 0|Offline
S
L
Points 3 [Total 2124]| Ratings 0| Comments 3| Invitations 0|Offline
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
S
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
S
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
S
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
S
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
S
Points 0 [Total 0]| Ratings 0| Comments 0| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.