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solve cos2x-2sinx-cos^2x-3 on the interval XE ( 0,2pi) improve each identity: a. SinX cod x tan x =1 - cos^2x b. Tan^2x sin^2x = tan^2x

  1. solve cos2x-2sinx-cos^2x-3 on the interval XE ( 0,2pi)
  2. improve each identity:

a. SinX cod x tan x =1 - cos^2x

b. Tan^2x sin^2x = tan^2x - sin^2x

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