Question: Which statement is true for all real values of ??sec?- tan? = 1tan?-sec? = 11 - tan? = sec?tan? - 1 = sec?

Which statement is true for all real values of ??sec²?- tan²?

= 1tan²?-sec²? = 11 - tan²? = sec²?tan²? - 1 = sec²?

Which statement is true for all real values of ??sec²?- tan²? = 1tan²?-sec²? = 11 - tan²? = sec²?tan²? - 1 = sec²?

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