The content of compulsory 4 in senior high school mathematics includes trigonometric function, plane vector and trigonometric identity transformation.
Trigonometric functions include sine function, cosine function and tangent function. Other trigonometric functions, such as cotangent function, secant function, cotangent function, dyadic function, cofactor function, semidyadic function and semifactorial function, are also used in other disciplines, such as navigation, surveying and engineering. The relationship between different trigonometric functions can be obtained by geometric intuition or calculation, which is called trigonometric identity.
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High school compulsory four trigonometric functions content:
1, arbitrary angle and arc system
2. Trigonometric function at any angle
Reading and thinking about trigonometry and astronomy
3. The inductive formula of trigonometric function
4. Images and properties of trigonometric functions
It is found that the function y=Asin(ωx+φ) and the function y=Acos(ωx+φ).
The properties of sine function and cosine function are discovered by exploring the trigonometric function line in the unit circle
In the application of information technology, y=tanx, x∈(-π/2, π/2) is drawn by tangent.
5. Image with function y=Asin(ωx+φ)
Amplitude, Period, Frequency and Phase of Reading and Thinking
6. Simple application of trigonometric function model
Baidu Encyclopedia-High School Mathematics Compulsory 4
Baidu encyclopedia-trigonometric function