Mathematics · Trigonometry
Which of the following identities/assertions is FALSE for all real numbers x where the functions are defined?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1sec2(x) - tan2(x) = 1 for all x ∈ &mathbb;R✓
- 2sin2(x) + cos2(x) = 1 for all x ∈ &mathbb;R
- 3cos(2x) = 1 - 2sin2(x) for all x ∈ &mathbb;R
- 4sin(2x) = 2sin(x)cos(x) for all x ∈ &mathbb;R
Correct answer
sec2(x) - tan2(x) = 1 for all x ∈ &mathbb;R
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