Triangle ABC has vertices A (2, 1), B(10,4) and C(5, 13). 13 a Show that cos ZABC = V7738 b Find the exact value of sin ZABC. c Hence find the area of triangle ABC.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 44E
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17 Triangle ABC has vertices A (2, 1), B(10, 4) and C(5, 13).
13
a Show that cos ZABC =
V7738
b Find the exact value of sin ZABC.
c Hence find the area of triangle ABC.
Transcribed Image Text:17 Triangle ABC has vertices A (2, 1), B(10, 4) and C(5, 13). 13 a Show that cos ZABC = V7738 b Find the exact value of sin ZABC. c Hence find the area of triangle ABC.
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