This video provides a review of sin(), cos(), tan, their inverses, and atan2().
- [Narrator] Let me quickly walk you through…the basic trigonometric functions present in math.h.…The default type used for most…functions in math.h is double.…So here are the double versions…of sine, cosine, and tangent.…They receive a double representing an angle,…and return a double as the result.…Inverse trigonometric functions are also implemented.…Here we have the arcsine, the arccosine, and the arctangent,…which receive real numbers and return angles.…
These functions check the validity of the argument.…For example, if 1.5 is sent to the arcsine function,…it returns an invalid value, like NAN, or not a number.…If you have worked with trigonometry…in computers long enough, you may have…come across some implementation of the atan2 function.…This is a better implementation of the arctangent.…Simply put, the arctangent is often used…to calculate the angle of a complex number…seen as a right triangle by dividing…the vertical leg by the horizontal leg.…
And this division is sent as an…argument to the arctangent.…
Author
Eduardo Corpeño
Released
2/6/2019- Working with header files
- C constants and types
- Unformatted and formatted input/output
- Accessing files with C functions
- Generating random numbers
- Converting strings
- Sorting and searching for data
- Manipulating strings
- Using mathematical functions
Skill Level Intermediate
Duration
Views
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Introduction
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1. The C Standard Library
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Overview of the library1m 51s
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Header files1m 50s
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Constants and types3m 47s
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2. Input and Output Library: stdio.h
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Unformatted I/O2m 34s
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Unformatted I/O example2m 34s
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Formatted I/O2m 51s
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Formatted I/O example5m 10s
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File access1m 55s
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File access example3m 53s
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3. General Purpose: stdlib.h
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Memory allocation1m 32s
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Memory allocation example2m 29s
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Random number generation1m 48s
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String conversion2m 11s
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String conversion example6m 29s
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Sort and search1m 52s
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Sort and search main4m 50s
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Challenge: Let's get random1m 38s
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Solution: Let's get random5m 40s
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4. String Functions: string.h
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String manipulation1m 21s
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String examination1m 43s
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5. Mathematical Functions: math.h
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Mathematical functions2m 50s
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Trigonometric functions1m 42s
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Powers and exponentials1m 9s
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Conclusion
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Next steps1m
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Video: Trigonometric functions