= TRIGONOMETRIC IDENTITIES AND EQUATIONS Verifying a trigonometric identity: Problem type 2 Complete the proof of the identity by choosing the Rule that justifies each step. (1 - sin x) tan x = sin x To see a detailed description of a Rule, select the More Information Button to the right of the Rule Statement Rule (1 - sin x) tan x = cos x tan x Rule ? sin x cos X Rule ? COS X hs = sin x Rule ? X Rule Algebra a Reciprocal Quotient Pythagorean Odd/Even O. Search