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(a) Is it true that cos (2-45°) = 2 cos 45°? Give exact answers in simplest form. (b) Expand cos (2-45°) as cos (45° +45°) using the sum formula for cosine. Then simplify the result. Bart: 0 (4

(a) Is it true that cos (2-45°) = 2 cos 45°? Give exact answers in simplest form. (b) Expand cos (2-45°) as cos (45° +45°) using the sum formula for cosine. Then simplify the result. Bart: 0 (4

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 62E
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(a) Is it true that cos (2-45°) =2 cos 45º? Give exact answers in simplest form. (b) Expand cos (2-45°) as cos (45° +45°) using the sum formula for cosine. Then simplify the result. Part: 0 / 4 Part 1 of 4 (a) Is it true that cos (2-45°) = 2 cos 45º? Give exact answers in simplest form. cos (2-45°) = 2 cos 45° = The statement cos (2-45°) = 2 cos 45° is (Choose one) ▼ true false ola X 10 S
Transcribed Image Text:(a) Is it true that cos (2-45°) =2 cos 45º? Give exact answers in simplest form. (b) Expand cos (2-45°) as cos (45° +45°) using the sum formula for cosine. Then simplify the result. Part: 0 / 4 Part 1 of 4 (a) Is it true that cos (2-45°) = 2 cos 45º? Give exact answers in simplest form. cos (2-45°) = 2 cos 45° = The statement cos (2-45°) = 2 cos 45° is (Choose one) ▼ true false ola X 10 S
Part 3 of 4 Evaluate each expression. Express your answers as simplified fractions and rationalize the denominator, if possible.. cos 45° cos 45°- sin 45° sin 45° = Part: 3/4 Part 4 of 4 Simplify. √2 √2 √2 √² = 11 2 2 2 2 010 11.0 X 3 _
Transcribed Image Text:Part 3 of 4 Evaluate each expression. Express your answers as simplified fractions and rationalize the denominator, if possible.. cos 45° cos 45°- sin 45° sin 45° = Part: 3/4 Part 4 of 4 Simplify. √2 √2 √2 √² = 11 2 2 2 2 010 11.0 X 3 _
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