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Step 3 Recall the Pythagorean identity which states that 1 tan u sec u Using this Pythagorean identity simplify the denominator 18 18 sec x

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Step 3 Recall the Pythagorean identity which states that 1 tan u sec u Using this Pythagorean identity simplify the denominator 18 18 sec x 1 Step 5 Step 4 Rewrite the expression 18 tan x 18 2 tan x 18 Finally use the Reciprocal identity 1 1 tan x tan x cot x to simplify the expression

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