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(Solved): Which of these functions are even? A. \( f(t)=\sec ^{2}(t)-1 \) B. \( f(\alpha)=1+\sec (\alpha) \) ...
Which of these functions are even? A. \( f(t)=\sec ^{2}(t)-1 \) B. \( f(\alpha)=1+\sec (\alpha) \) C. \( f(x)=\csc \left(x^{2}\right) \) D. \( f(t)=2+\tan (t) \) E. \( f(x)=\sin (2 x) \) F. \( f(\beta)=1+\csc (\beta) \)
Expert Answer
Note: ? For even function ?f(?x)=f(x) ? For odd function ?f(?x)=?f(x) Given: (1) f(t)=sec2t?1 ?f(?t)=sec2(?t)?1 =sec2t?1=f(t) Ther