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sin(v+180)=-sin v , cos(v+180)=-cos v
Author:
Asum
opposite-angle identities
GeoGebra
By opposite angles we mean two angles that differ by a straight angle, that is, by π = 180°
New Resources
Perpendicular Lines: Quick Exploration
繪畫垂直線
Right Triangle Inscribed in a Semicircle
Graphing Basic and Compound Inequalities
Deciding How New Information Affects Probability
Discover Resources
SubSpace - Closed adition ; Closed Mulltiplication; and Zero
Algebra 2
Ángulos internos de un triángulo
Geogebra invariants
Tangents
Discover Topics
General Quadrilateral
Special Points
Conditional Probability
Bar Chart or Bar Graph
Statistics