Cosine Theorem; Business Application - Sharp EL-512 Instruction Manual

Formula 3 — Cosine Theorem
Angle Mode: DEG (Set DEG mode before inputting the firs t formula)
a = V b 2 + c2 — 2bc cos Q
Case A. b = 2, c = 3, 6 = 60°
Case B. b = 10, c = 12, Q = 30°
Procedure: (
2
rriF | (3D
i 2 g § m @ s i
(HB 3 US DO S 3 0 3 1
2 Ini"CD. E 3 [2] CS JjJS
eo a [ = i
b
Case A answer a = 2.64575131'
Formula 4 — Business Application (Trade discounts)
There are many business applications fo r which the EL-512 is an ideal tool'
For example, a series of discounts from the list price are offered. They
35%, 3%, 2%. Calculate the final price fo r a series of prices starting at
and increasing by increments o f $10.
The equivalent discount is:
(1-first discount) x (1-second discount) x (1-third discount)
Procedure:
(2 n d F j |4p 0 (**
m
! (D3 (D§
10 (M +)
.65 ( 3 .97 [X ] .98 (X I S I [ 3 Answer: 6.1789
|2 n dF | [LR N ]
[Solution]
Form ula 1: PHI 2 W
I
t o w p
]
Answer:
Answer:
12.56637061
12.56637061
18.84955592
28.27433388
Circumferance @ r = 2
(27r
x
2)
Area @ r = 2
(
it
x
22 )
Circumferance @ r = 3
Area @ r = 3
—To proceed the calculation in the same form ula w ith different variables, just
press the (w | key. (In the above case, the formula designation key can be
also used.)