Mission+4

A tornado has hit Green River, Wyoming, stranding hundreds of people without electricity. In order to restore power to the city, find the error in the following problem. Correct the error and correctly simplify the problem.

Describe the error:

(1 + tan x)[1 + cot( – x)] = (1 + tan x)(1 + cot x) = 1 + cot x + tan x + tan x · cot x = 1 + cot x + tan x + 1 = 2 + cot x + tan x

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