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Peer reviewedHawkins, Vincent J. – School Science and Mathematics, 1985
A model, easily constructed by students, is used to assist in seeking basic Pythagorean identities used to prove more complex ones. (MNS)
Descriptors: Mathematical Models, Mathematics Instruction, Secondary Education, Secondary School Mathematics
Peer reviewedGermain-McCarthy, Yvelyne – Mathematics Teacher, 1994
Discusses a method of graphing polar equations using information from the Cartesian graphs of trigonometric functions. (MKR)
Descriptors: Analytic Geometry, Functions (Mathematics), Graphs, Mathematics Instruction
Wavrik, John J. – Calculators/Computers Magazine, 1978
A game for the HP-25 programable calculator is discussed. The objectives of the game are to introduce angle measurement and the rudiments of trigonometry. A program for the game is given. (MP)
Descriptors: Calculators, Elementary School Mathematics, Elementary Secondary Education, Games
Peer reviewedMathematics Teacher, 1985
Two brief articles are included, one on a different method for solving percentage problems, and one on a trick for the calculator involving the sine to find one's age. (MNS)
Descriptors: Calculators, Mathematics Instruction, Percentage, Secondary Education
Peer reviewedTapson, Frank – Mathematics in School, 1984
Four masters of trigonometrical tables are provided, so that students will have a basic set. Tables for sines, tangents, and cosines and a table of formulae for right triangles are given. (MNS)
Descriptors: Instructional Materials, Mathematics Instruction, Mathematics Materials, Secondary School Mathematics
Peer reviewedFay, Temple H.; O'Neal, Elizabeth A. – Mathematics and Computer Education, 1985
The authors draw together a variety of facts concerning a nonlinear differential equation and compare the exact solution with approximate solutions. Then they provide an expository introduction to the elliptic sine function suitable for presentation in undergraduate courses on differential equations. (MNS)
Descriptors: College Mathematics, Functions (Mathematics), Higher Education, Mathematics Instruction
Peer reviewedRen, Guanshen – Mathematics Teacher, 1995
Presents proofs of some trigonometric identities from a geometric point of view. (MKR)
Descriptors: Geometry, High Schools, Learning Activities, Mathematics Education
Peer reviewedDuncan, David R.; Litwiller, Bonnie – New York State Mathematics Teachers' Journal, 1995
Describes an analysis of the direction taken by a baseball immediately after coming into contact with the bat. Uses geometry, trigonometry, and physics. (MKR)
Descriptors: Baseball, Geometry, Mathematical Applications, Mathematics Education
Peer reviewedSchloemer, Cathy G. – Mathematics Teacher, 2000
Uses the average-monthly-temperature function as an application of the sine wave. Argues that the attractive aspect of gas bill graphs is that they clearly illustrate that sinusoidal curves are useful and meaningful in an everyday context. (ASK)
Descriptors: Graphing Calculators, Mathematics Activities, Relevance (Education), Secondary Education
Peer reviewedSmith, David A.; Cunningham, R. Stephen – College Mathematics Journal, 1986
Computer graphics are used to display the sum of the first few terms of the series solution for the problem of the vibrating string frequently discussed in introductory courses on differential equations. (MNS)
Descriptors: College Mathematics, Computer Graphics, Higher Education, Mathematical Applications
Peer reviewedFay, Temple H. – Mathematics and Computer Education, 1986
An old way to determine asymptotes for curves described in polar coordinates is presented. Practice in solving trigonometric equations, in differentiation, and in calculating limits is involved. (MNS)
Descriptors: Calculus, College Mathematics, Drills (Practice), Higher Education
Peer reviewedKilpatrick, Harold C.; Waters, William M., Jr. – Mathematics and Computer Education, 1986
How to determine when there is a unique solution when two sides and an angle of a triangle are known, using simple algebra and the law of cosines, is described. (MNS)
Descriptors: Algebra, College Mathematics, Geometric Concepts, Higher Education
Peer reviewedRoberti, Joseph V. – Mathematics Teacher, 1979
A process for eliminating the xy term in a quadratic equation in two variables is presented. The author feels this process will be within the reach of more high school students than more commonly used methods. (MK)
Descriptors: Algebra, Mathematical Enrichment, Mathematics Curriculum, Mathematics Instruction
Peer reviewedAlvarez, Richard – Mathematics Teacher, 1996
Describes a project in which trigonometry and precalculus students cooperate to measure the height of an inaccessible water tower. (MKR)
Descriptors: Calculus, High Schools, Mathematical Applications, Mathematics Instruction
Peer reviewedFakler, Robert – Mathematics Teacher, 1995
Presents a solution to the problem of finding the probability that a needle would cross a crack in a tile floor when dropped. (MKR)
Descriptors: Calculus, Geometry, Mathematics Education, Mathematics Instruction
