Math Problem Statement
Encuentre el valor exacto de cos 15° usando el hecho que 15° = 60° - 45°.
Solution
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Angle Difference Identity
Formulas
Cosine of difference of angles: cos(A - B) = cos(A)cos(B) + sin(A)sin(B)
Theorems
Angle subtraction identity for cosine
Suitable Grade Level
Grades 10-12