Mathematics, 03.08.2019 19:20 jayla69

If cos2 x + 2cosx - 2 = 0, then cosx = a. -1 ± sqrt 3 b. 1 ± sqrt 3 c. ± sqrt 3 d. 1

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If cos2 x + 2cosx - 2 = 0, then cosx = a. -1 ± sqrt 3 b. 1 ± sqrt 3 c. ± sqrt 3 d. 1...