Chapter 9: Q. 2 (page 582)

The difference formula for cosine is $\cos (A - B) =________.$

Short Answer

Expert verified

The difference formula for cosine is $\cos (A - B) = c o s A c o s B + s i n A s i n B .$

Step by step solution

Step 1. Given Information

The cosine function is a periodic function. The difference formula for cosine states that the product of the cosines of the angles plus the product of the sine of the angles is equal to the difference of the cosine of the two angles.

Step 2. Filling the blank

The difference formula for cosine is $\cos (A - B) = \cos A \cos B + \sin A \sin B .$

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The difference formula for cosine is $\cos (A - B) =________.$

Short Answer

Step by step solution

Step 1. Given Information

Step 2. Filling the blank

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The difference formula for cosine iscosA-B=________.

Short Answer

Step by step solution

Step 1. Given Information

Step 2. Filling the blank

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Applied Mathematics

Mechanics Maths

Geometry

Calculus

Decision Maths

Pure Maths

Study anywhere. Anytime. Across all devices.

The difference formula for cosine is $\cos (A - B) =________.$