Problem

$\cos (x+y)$

Answer

Expert–verified
Hide Steps
Answer

\( \boxed{\cos (x+y) = \cos x \cos y - \sin x \sin y} \)

Steps

Step 1 ：Given the expression: \( \cos (x+y) \)

Step 2 ：Using the trigonometric identity: \( \cos (x+y) = \cos x \cos y - \sin x \sin y \)

Step 3 ：\( \boxed{\cos (x+y) = \cos x \cos y - \sin x \sin y} \)

link_gpt

Popular Problems

Compute $\int_{0}^{\ln (2) / … Solve the triangle. \[ \mathr… QUESTION 2 - 1 POINT Solve th… 5. Suppose you are a computer… Answer the statistical measur… $(-\infty, 2) \cap(-6, \infty… A firm does not pay a dividen… Math 112 Section: 4. Tubercul… Find $y^{\prime}$ if $y=\ln \… 3. (3pts) Cherry trees in a c… More