Step * 1 of Lemma rtan_functionality_wrt_rleq


1. ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x))
2. {x:ℝx ∈ (-(π/2), π/2)} 
3. {x:ℝx ∈ (-(π/2), π/2)} 
4. x ≤ y
⊢ rtan(x) ≤ rtan(y)
BY
((Assert ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x)^2) BY
          (ParallelOp THEN EAuto 2))
   THEN InstLemma `derivative-implies-increasing` [⌜(-(π/2), π/2)⌝;⌜λ2x.rtan(x)⌝;⌜λ2x.(r1/rcos(x)^2)⌝]⋅
   THEN Auto) }

1
.....antecedent..... 
1. ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x))
2. {x:ℝx ∈ (-(π/2), π/2)} 
3. {x:ℝx ∈ (-(π/2), π/2)} 
4. x ≤ y
5. ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x)^2)
⊢ (r1/rcos(x)^2) continuous for x ∈ (-(π/2), π/2)

2
1. ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x))
2. {x:ℝx ∈ (-(π/2), π/2)} 
3. {x:ℝx ∈ (-(π/2), π/2)} 
4. x ≤ y
5. ∀x:{x:ℝx ∈ (-(π/2), π/2)} (r0 < rcos(x)^2)
6. x1 {x:ℝx ∈ (-(π/2), π/2)} 
⊢ r0 ≤ (r1/rcos(x1)^2)


Latex:


Latex:

1.  \mforall{}x:\{x:\mBbbR{}|  x  \mmember{}  (-(\mpi{}/2),  \mpi{}/2)\}  .  (r0  <  rcos(x))
2.  x  :  \{x:\mBbbR{}|  x  \mmember{}  (-(\mpi{}/2),  \mpi{}/2)\} 
3.  y  :  \{x:\mBbbR{}|  x  \mmember{}  (-(\mpi{}/2),  \mpi{}/2)\} 
4.  x  \mleq{}  y
\mvdash{}  rtan(x)  \mleq{}  rtan(y)


By


Latex:
((Assert  \mforall{}x:\{x:\mBbbR{}|  x  \mmember{}  (-(\mpi{}/2),  \mpi{}/2)\}  .  (r0  <  rcos(x)\^{}2)  BY
                (ParallelOp  1  THEN  EAuto  2))
  THEN  InstLemma  `derivative-implies-increasing`  [\mkleeneopen{}(-(\mpi{}/2),  \mpi{}/2)\mkleeneclose{};\mkleeneopen{}\mlambda{}\msubtwo{}x.rtan(x)\mkleeneclose{};\mkleeneopen{}\mlambda{}\msubtwo{}x.(r1/rcos(x)\^{}2)\mkleeneclose{}]
  \mcdot{}
  THEN  Auto)




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