Examples and Practice Test (with Solutions)

tan 2 x secx sec x 2sec x 2sec x Since we want a "common trig function", we'll use the identity: 1 + tan2x = sec2x O Solving and Graphing Trig Equations secx — 2 secx = 2 x = 60, 300 degrees secx 2 3 secx 3secx — 2 (multiply by 2 for convenience) 2secx + 1 — (rearrange) secx (factor) Not possible (solve) (2secx + l)(secx — 2) 3 - e + 225 ................
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