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Larson Pre-Calculus 4.3-4.5
Sections 4.3-4.5
11
Mathematics
Undergraduate 1
02/04/2015

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Term
sin(theta)
Definition
opposite over hypotenuse
Term
cos(theta)
Definition
adjacent over hypotenuse
Term
tan(theta)
Definition
opposite over adjacent
Term
Sin example
Definition
Whats sine of 35 Degrees= Opposite/Hypotenuse
=2.8/4.9
=0.57
Term
Trig Identities
Definition
4, reciprical identities, even/odd, quotient, pythagorem therom,
Term
Reciprical Identities
Definition
sin(theta)= 1/cos(theta), etc.
Term
Even/Odd Identities
Definition
Cos(-Theta)=cos(Theta)<-- cos,sec are even
Sin(-Theta)= -sin(Theta)<-- sin,csc,tan
Tan(-Theta) = -tan(Theta)<-- cot, are odd
Term
Quotient Identities
Definition
Tan(Theta)= sin(Theta)/cos(Theta)
Cot(Theta)= cos(Theta)/sin(Theta)
Term
Pythagorem Theorm Identity
Definition
Sin^2(Theta)+cos^2(Theta)=1
Tan^2(Theta)+1=sec^2(Theta)
1 + cot^2(Theta) = csc^2(Theta)
Term
reference angle
Definition
always acute except for right angles,anyh angle (Theta) can be compared with an acute(or right) reference angle (theta Prime)
Term
Theta prime
Definition
acute angle between theta and x-axis
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