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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 26840 | . . . 4 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ (𝐴↑2) ≠ -1)) | |
| 2 | 1 | simplbi 497 | . . 3 ⊢ (𝐴 ∈ dom arctan → 𝐴 ∈ ℂ) |
| 3 | 2 | cjcld 15215 | . 2 ⊢ (𝐴 ∈ dom arctan → (∗‘𝐴) ∈ ℂ) |
| 4 | 2nn0 12518 | . . . 4 ⊢ 2 ∈ ℕ0 | |
| 5 | cjexp 15169 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℕ0) → (∗‘(𝐴↑2)) = ((∗‘𝐴)↑2)) | |
| 6 | 2, 4, 5 | sylancl 586 | . . 3 ⊢ (𝐴 ∈ dom arctan → (∗‘(𝐴↑2)) = ((∗‘𝐴)↑2)) |
| 7 | 2 | sqcld 14162 | . . . . . 6 ⊢ (𝐴 ∈ dom arctan → (𝐴↑2) ∈ ℂ) |
| 8 | 7 | cjcjd 15218 | . . . . 5 ⊢ (𝐴 ∈ dom arctan → (∗‘(∗‘(𝐴↑2))) = (𝐴↑2)) |
| 9 | 1 | simprbi 496 | . . . . 5 ⊢ (𝐴 ∈ dom arctan → (𝐴↑2) ≠ -1) |
| 10 | 8, 9 | eqnetrd 2999 | . . . 4 ⊢ (𝐴 ∈ dom arctan → (∗‘(∗‘(𝐴↑2))) ≠ -1) |
| 11 | fveq2 6876 | . . . . . 6 ⊢ ((∗‘(𝐴↑2)) = -1 → (∗‘(∗‘(𝐴↑2))) = (∗‘-1)) | |
| 12 | neg1rr 12355 | . . . . . . 7 ⊢ -1 ∈ ℝ | |
| 13 | cjre 15158 | . . . . . . 7 ⊢ (-1 ∈ ℝ → (∗‘-1) = -1) | |
| 14 | 12, 13 | ax-mp 5 | . . . . . 6 ⊢ (∗‘-1) = -1 |
| 15 | 11, 14 | eqtrdi 2786 | . . . . 5 ⊢ ((∗‘(𝐴↑2)) = -1 → (∗‘(∗‘(𝐴↑2))) = -1) |
| 16 | 15 | necon3i 2964 | . . . 4 ⊢ ((∗‘(∗‘(𝐴↑2))) ≠ -1 → (∗‘(𝐴↑2)) ≠ -1) |
| 17 | 10, 16 | syl 17 | . . 3 ⊢ (𝐴 ∈ dom arctan → (∗‘(𝐴↑2)) ≠ -1) |
| 18 | 6, 17 | eqnetrrd 3000 | . 2 ⊢ (𝐴 ∈ dom arctan → ((∗‘𝐴)↑2) ≠ -1) |
| 19 | atandm3 26840 | . 2 ⊢ ((∗‘𝐴) ∈ dom arctan ↔ ((∗‘𝐴) ∈ ℂ ∧ ((∗‘𝐴)↑2) ≠ -1)) | |
| 20 | 3, 18, 19 | sylanbrc 583 | 1 ⊢ (𝐴 ∈ dom arctan → (∗‘𝐴) ∈ dom arctan) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2108 ≠ wne 2932 dom cdm 5654 ‘cfv 6531 (class class class)co 7405 ℂcc 11127 ℝcr 11128 1c1 11130 -cneg 11467 2c2 12295 ℕ0cn0 12501 ↑cexp 14079 ∗ccj 15115 arctancatan 26826 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-cnex 11185 ax-resscn 11186 ax-1cn 11187 ax-icn 11188 ax-addcl 11189 ax-addrcl 11190 ax-mulcl 11191 ax-mulrcl 11192 ax-mulcom 11193 ax-addass 11194 ax-mulass 11195 ax-distr 11196 ax-i2m1 11197 ax-1ne0 11198 ax-1rid 11199 ax-rnegex 11200 ax-rrecex 11201 ax-cnre 11202 ax-pre-lttri 11203 ax-pre-lttrn 11204 ax-pre-ltadd 11205 ax-pre-mulgt0 11206 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7862 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8719 df-en 8960 df-dom 8961 df-sdom 8962 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-sub 11468 df-neg 11469 df-div 11895 df-nn 12241 df-2 12303 df-n0 12502 df-z 12589 df-uz 12853 df-seq 14020 df-exp 14080 df-cj 15118 df-re 15119 df-im 15120 df-atan 26829 |
| This theorem is referenced by: atancj 26872 |
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