安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- Cosines - Clark University
Cosines Definition of cosine The cosine of an angle is defined as the sine of the complementary angle The complementary angle equals the given angle subtracted from a right angle, 90° For instance, if the angle is 30°, then its complement is 60° Generally, for any angle θ, cos θ = sin (90° – θ)
- MFG The Sine and Cosine Functions
The special values of sine and cosine in the first quadrant are very useful to know, since knowing them allows you to quickly evaluate the sine and cosine of common angles without needing to look at a reference sheet or use your calculator
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