User`s guide

90 — CONSTRUCTION MASTER

PRO
TRIGONOMETRY AND D:M:S EXAMPLES
PRACTICAL TRIGONOMETRIC FORMULAS
The drawing and formulas below illustrate practical trigonometric
applications:
C = 5 ft
B = 4 ft
A = 3 ft
b
b = 36.8699°
a
a = 53.1301°
Given side A and angle a, find:
Side C A [÷] a [Cos] [=]
(i.e., 3 [Feet] [÷] 53.13 [Cos] [=])
Side B A [x] a [Tan] [=]
Angle b 90° [–] a [=]
Given side A and angle b, find:
Side B A [÷] b [Tan] [=]
Side C A [÷] b [Sine] [=]
Angle a 90° [–] b [=]
Given side B and angle a, find:
Side A B [÷] a [Tan] [=]
Side C B [÷] a [Sine] [=]
Given side C and angle a, find:
Side A C [x] a [Cos] [=]
Side B C [x] a [Sine] [=]
Given side A and side C, find:
Angle a A [÷] C [=] [Conv] [Cos]
Angle b A [÷] C [=] [Conv] [Sine]