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USER’S GUIDE — 101
The Sine of an angle is the ratio of the opposite side over the
Hypotenuse:
The Cosine of an angle is the ratio of the adjacent side over the
Hypotenuse:
The Tangent of an angle is the ratio of the opposite side over the
adjacent side:
Tangent Tan =
Opposite
Adjacent
tan A =
a
b
c
a
b
A
Cosine Cos =
Adjacent
Hypotenuse
cos A =
b
c
c
a
b
A
Sine Sin =
Opposite
Hypotenuse
sin A =
a
c
c
a
b
A
APPENDIX A — TRIGONOMETRY FORMULAS
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