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The Complete Idiot's Guide to Trigonometry by Izolda Fotiyeva, Dmitriy Fotiyev

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Glossary

absolute value of a complex number The length of the arrow representing the

complex number on the complex plane. If z = a + bi, then 303-1.png.

acute angle An angle with a measure less than 90°.

amplitude of a periodic function One half of the difference between the maximum and the minimum values of the function.

angle Two rays that share an endpoint.

angle of depression Angle by which an observer’s line of sight must be lowered from the horizontal to the point observed.

angle of elevation Angle by which an observer’s line of sight must be raised from the horizontal to the point observed.

asymptote A line that a curve approaches closer and closer ...

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