subtraction formula for cosine - noorduyn's math …...compound angles cos(x+ y) = cos x cos y...

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Subtraction Formula for Cosine: Addition Formula for Cosine: Addition a Formula for Sine: Subtraction Formula for Sine:

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Page 1: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following

Subtraction Formula for Cosine: Addition Formula for Cosine: Addition a Formula for Sine: Subtraction Formula for Sine:

Page 2: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following

Ex 1: Find the exact value of sin50°cos20° - cos50°sin20° Ex 2: Calculate sin exactly Ex 3: If the cosa= 2/3, and cos

Page 3: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following
Page 4: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following
Page 5: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following
Page 6: Subtraction Formula for Cosine - Noorduyn's Math …...Compound Angles cos(x+ y) = cos x cos y — sin x sin y cos(x — y) = cos x cos y + sin x sin y 1. Express each of the following