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| Mirrors > Home > MPE Home > Th. List > atandmcj | Structured version Visualization version GIF version | ||
| Description: The arctangent function distributes under conjugation. (Contributed by Mario Carneiro, 31-Mar-2015.) |
| Ref | Expression |
|---|---|
| atandmcj | ⊢ (𝐴 ∈ dom arctan → (∗‘𝐴) ∈ dom arctan) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | atandm3 27043 | . . . 4 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ (𝐴↑2) ≠ -1)) | |
| 2 | 1 | simplbi 501 | . . 3 ⊢ (𝐴 ∈ dom arctan → 𝐴 ∈ ℂ) |
| 3 | 2 | cjcld 15243 | . 2 ⊢ (𝐴 ∈ dom arctan → (∗‘𝐴) ∈ ℂ) |
| 4 | 2nn0 12516 | . . . 4 ⊢ 2 ∈ ℕ0 | |
| 5 | cjexp 15197 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℕ0) → (∗‘(𝐴↑2)) = ((∗‘𝐴)↑2)) | |
| 6 | 2, 4, 5 | sylancl 597 | . . 3 ⊢ (𝐴 ∈ dom arctan → (∗‘(𝐴↑2)) = ((∗‘𝐴)↑2)) |
| 7 | 2 | sqcld 14176 | . . . . . 6 ⊢ (𝐴 ∈ dom arctan → (𝐴↑2) ∈ ℂ) |
| 8 | 7 | cjcjd 15246 | . . . . 5 ⊢ (𝐴 ∈ dom arctan → (∗‘(∗‘(𝐴↑2))) = (𝐴↑2)) |
| 9 | 1 | simprbi 502 | . . . . 5 ⊢ (𝐴 ∈ dom arctan → (𝐴↑2) ≠ -1) |
| 10 | 8, 9 | eqnetrd 3025 | . . . 4 ⊢ (𝐴 ∈ dom arctan → (∗‘(∗‘(𝐴↑2))) ≠ -1) |
| 11 | fveq2 6881 | . . . . . 6 ⊢ ((∗‘(𝐴↑2)) = -1 → (∗‘(∗‘(𝐴↑2))) = (∗‘-1)) | |
| 12 | neg1rr 12199 | . . . . . . 7 ⊢ -1 ∈ ℝ | |
| 13 | cjre 15186 | . . . . . . 7 ⊢ (-1 ∈ ℝ → (∗‘-1) = -1) | |
| 14 | 12, 13 | ax-mp 5 | . . . . . 6 ⊢ (∗‘-1) = -1 |
| 15 | 11, 14 | eqtrdi 2814 | . . . . 5 ⊢ ((∗‘(𝐴↑2)) = -1 → (∗‘(∗‘(𝐴↑2))) = -1) |
| 16 | 15 | necon3i 2990 | . . . 4 ⊢ ((∗‘(∗‘(𝐴↑2))) ≠ -1 → (∗‘(𝐴↑2)) ≠ -1) |
| 17 | 10, 16 | syl 18 | . . 3 ⊢ (𝐴 ∈ dom arctan → (∗‘(𝐴↑2)) ≠ -1) |
| 18 | 6, 17 | eqnetrrd 3026 | . 2 ⊢ (𝐴 ∈ dom arctan → ((∗‘𝐴)↑2) ≠ -1) |
| 19 | atandm3 27043 | . 2 ⊢ ((∗‘𝐴) ∈ dom arctan ↔ ((∗‘𝐴) ∈ ℂ ∧ ((∗‘𝐴)↑2) ≠ -1)) | |
| 20 | 3, 18, 19 | sylanbrc 594 | 1 ⊢ (𝐴 ∈ dom arctan → (∗‘𝐴) ∈ dom arctan) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 dom cdm 5661 ‘cfv 6536 (class class class)co 7410 ℂcc 11093 ℝcr 11094 1c1 11096 -cneg 11437 2c2 12290 ℕ0cn0 12499 ↑cexp 14093 ∗ccj 15143 arctancatan 27029 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-div 11867 df-nn 12229 df-2 12298 df-n0 12500 df-z 12587 df-uz 12858 df-seq 14034 df-exp 14094 df-cj 15146 df-re 15147 df-im 15148 df-atan 27032 |
| This theorem is referenced by: atancj 27075 |
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