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66 — S
HEET METAL/HVAC PRO CALC
1) Find the elevation offset “Ye” and the actual length “Xe” in D1:
KEYSTROKE DISPLAY
1. Enter sides a, b, and c:
o o 0.
7 f 9 i 7 / 1 6 Ç 4 A 7 FEET 9-7/16 INCH
2 f 2 i Ç 5 B 2 FEET 2 INCH
7 f 1 1 i 1 / 8 Ç 6 C 7 FEET 11-1/8 INCH
2. Calculate and input Theta by subtracting Degree “A” (found by the
Law of Cosines) from Right Angle of 90°:
9 0 – Ç 9 /
_
A 78.40512°
= 11.59488
(Theta θ)
p /
_
Ø 11.59488°
3. Recall stored slant length “c” and input as “r”:
® 6 = d R 7 FEET 11-1/8 INCH
4. Calculate elevation offset “Ye”:
r Y 1 FEET 7-1/8 INCH
5. Calculate actual length “Xe”:
R X 7 FEET 9-3/16 INCH
STORED
STORED
STORED
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