The expression sec x Step 1: + tan x Step 2: 1 COS.X tan x 1 Step 3: cos x sinx COS X Step 4: sec x + 1 tan x Step 5: cscx+ 1 tan x tan x COS X sinx cos x sinx sinx COS X sin x Step 6: cscx+cotx Which identity/formula was used to simplify from step 1 to step 2? Reciprocal identity O Quotient identity was simplified with the following steps: Sum formula O Double-angle formula

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