第7讲 三角函数 视频课程
第7讲 三角函数
视频时长
60 分钟
建议学时
5-6 小时
语言
中文
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学习目标
- Understand and use the definitions of trigonometric ratios (sine, cosine, tangent) in right-angled triangles and using the unit circle for any angle.
- Know and apply exact trigonometric values for key angles.
- Work proficiently with radian measure, including arc length and area of a sector.
- Recognise, sketch, and understand the properties (periodicity, symmetry, amplitude) of the graphs of sine, cosine, and tangent.
- Know, derive, and apply fundamental trigonometric identities, sum/difference identities, and double angle formulae.
- Simplify trigonometric expressions and solve basic trigonometric equations.
