Statements AABC with altitude sin(A) C c. sin(A) = h h BD and cos(4) r C Reasons Given Reason 1 Multiplication property of equality c. cos(A) = r a² = 1² + (b − 1)² a = (sin(A))² + (b-c: cos(A)) ² Reason 2 Substitution a² = c² sin²(A) + [b² − 2bc · cos(A) + cos²(A)] Expand by multiplication 2 a=²[sin²(A) + cos² (A)] + b² − 2bc.cos(A) Reason 3 sin²(A) + cos² (A) = 1 a = [1] + b²-2bc cos(A) +6²-2bc cos(A) Reason 4 Substitution Reason 5 =
Statements AABC with altitude sin(A) C c. sin(A) = h h BD and cos(4) r C Reasons Given Reason 1 Multiplication property of equality c. cos(A) = r a² = 1² + (b − 1)² a = (sin(A))² + (b-c: cos(A)) ² Reason 2 Substitution a² = c² sin²(A) + [b² − 2bc · cos(A) + cos²(A)] Expand by multiplication 2 a=²[sin²(A) + cos² (A)] + b² − 2bc.cos(A) Reason 3 sin²(A) + cos² (A) = 1 a = [1] + b²-2bc cos(A) +6²-2bc cos(A) Reason 4 Substitution Reason 5 =
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 38E
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