Which compound angle formula is the easiest to use to develop the expression cos² 8-sin²0? a) subtraction formula for sine Ob) addition formula for cosine Oc) addition formula for sine Od) subtraction formula for cosine

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 16E
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Which compound angle formula is the easiest to use to develop the expression
cos²0-sin² 0?
a) subtraction formula for sine
Ob) addition formula for cosine
O c) addition formula for sine
Od) subtraction formula for cosine
Transcribed Image Text:Which compound angle formula is the easiest to use to develop the expression cos²0-sin² 0? a) subtraction formula for sine Ob) addition formula for cosine O c) addition formula for sine Od) subtraction formula for cosine
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