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GCSE Maths Higher Trig. rules
GCSE Maths Higher Trig. rules
12
Mathematics
10th Grade
10/25/2010

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Cards

Term
What is the hypotenuse?
Definition
The longest side in a right angled triangle
Term
What is the opposite?
Definition
The opposite is the side opposite the angle we wish to find / have been given
Term
What is the adjacent?
Definition
The side next to / adjacent to the angle
Term
An acronym for trigonometry rules?
Definition
SOHCAHTOA
Term
In "SOHCAHTOA", what does "SOH" stand for?
Definition
Sin(Θ)=

Opposite


Hypotenuse

Term
In "SOHCAHTOA", what does "CAH" stand for?
Definition
Cos(Θ)= Adjacent
Hypotenuse
Term
In "SOHCAHTOA", what does "TOA" stand for?
Definition
Tan(Θ)= Opposite
Adjacent
Term
What are the two equations for Sine Rule?
Definition
 Sin(A)
a
= Sin(B)
b
=  Sin(C)
c
a
Sin(A)
= b
Sin(B)
=  c
Sin(C)
Term
In Sine rule and Cosine Rule, what do capital / lowercase letters represent?
Definition
An upper case letter represents an angle in the triangle. The corresponding lowercase letter represents the opposite side.
Term
What is the formula for Cosine Rule, where a2 is the subject?
Definition
a2 = b2 + c2 - 2bc x Cos(A)
Term
What is the formula for Cosine Rule, where Cos(A) is the subject?
Definition
Cos(A)= b2 + c2 - a2
2bc
Term
What is the Trig formula for the ares of a triangle?
Definition
Area =
1
2
 x ab x Sin(C)
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