Review the incomplete steps in the derivation of the tangent

Last updated: 2/8/2024

Review the incomplete steps in the derivation of the tangent sum identity Step 1 Original expression Step 2 Rewrite using the definition of tangent Step 3 Apply the sine sum identity and cosine sum identity Step 4 Step 5 Simplify using the definition of tangent tan x y sin x y cos x y sin x cos y cos x sin y cos x cos y sin x sin y Which action can be taken to the expression in Step 3 to give an expression for Step 4 divide both the numerator and denominator by sin x sin y divide both the numerator and denominator by sin x cos y O divide both the numerator and denominator by cos x sin y tan x tan y 1 tan x tan y