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There are 3 NRICH Mathematical resources connected to Trigonometric functions and graphs, you may find related items under Coordinates, functions and graphs.
Broad Topics > Coordinates, functions and graphs > Trigonometric functions and graphsCan you work out which processes are represented by the graphs?
10 graphs of experimental data are given. Can you use a spreadsheet to find algebraic graphs which match them closely, and thus discover the formulae most likely to govern the underlying processes?
The sine of an angle is equal to the cosine of its complement. Can you explain why and does this rule extend beyond angles of 90 degrees?