172 PreCalculus Trigonometry The Trigonometric Laws Lab Objective: Derive the trigonometric laws and the formula for area of a triangle involving sine. Use the trigonometric laws. Derive the Law of Sines and the Area of a Triangle. a 1. Derive the Law of Sines, sin A You are given the triangle with altitude from vertex C, and the %3D sin B measures of sides a and b and angles A and B. NOTE: You are proving the Law of Sines. You may use any of the identities from chapters 4 and 5 to show b. how to get to sin A sin B HINT: Use sine with the two right triangles. b. B.
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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