http://tibasicdev.wikidot.com/forum/t-14467801/ti-nspire-cx-ii-cas-texas-instruments-model-can-t-use-tangen Posts in the discussion thread "TI-nspire CX II (CAS) Texas Instruments Model Can't Use Tangent line???" - So when I go to menu, 4 (Calculus), there's no ninth option for tangent line. There's just 1-6, the sixth option being numerical function maximum. Do I need a hardware or software update? Just bought mine through amazon today, please help! Tue, 15 Sep 2026 00:01:54 +0000 http://tibasicdev.wikidot.com/forum/t-14467801#post-5188315 http://tibasicdev.wikidot.com/forum/t-14467801/ti-nspire-cx-ii-cas-texas-instruments-model-can-t-use-tangen#post-5188315 Sat, 29 Jan 2022 02:02:19 +0000 Tyresedone 7867323 So when I go to menu, 4 (Calculus), there's no ninth option for tangent line. There's just 1-6, the sixth option being numerical function maximum. Do I need a hardware or software update? Just bought mine through amazon today, please help!

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