Calculated Industries 4090 - Manual (Page 67)

66 — ITI S
HEET
M
ETAL
/HVAC P
RO
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