Chaper 7.2 Flashcards
1
Q
Opposite side of a triangle
A
Hypotenuse
2
Q
Sin of theta
A
b/c or opposite/hypotenuse
3
Q
Cos of theta
A
a/c or adjacent/hypotenuse
4
Q
Tan of theta
A
b/a or opposite/adjacent
5
Q
Csc of theta
A
c/b or hypotenuse/opposite
6
Q
Sec of theta
A
c/a or hypotenuse/adjacent
7
Q
Cot of theta
A
a/b or adjacent/opposite
8
Q
Reciprocal Identities
A
csc= 1/sin sec= 1/cos cot= 1/tan
9
Q
Quotient Identities
A
tan=sin/cos
cot=cos/sin
10
Q
1=?
A
sin^2+cos^2
11
Q
sin^2=
A
1-cos^2
12
Q
cos^2=
A
1-sin^2
13
Q
Sec^2=
A
Tan^2 +1
14
Q
csc^2=
A
cot^2+1
15
Q
tan^2=
A
Sec^2-1
16
Q
Cot^2=
A
csc^2-1
17
Q
Fundamental Identities
A
tan= sin/cos cot= cos/sin csc= 1/sin sec= 1/cos cot= 1/tan Sin^2 + cos^2=1 Tan^2 +1= sec^2 Cot^2 +1= csc^2
18
Q
Complementary Angles
A
Sin= cos(90 degrees-theta) Cos= sin(90 degrees-theta) Tan= Cot(90 degrees-theta) Csc= sec(90 degrees-theta) Sec= csc(90 degrees-theta) Cot= tan(90 degrees-theta)
19
Q
Right triangle
A
Has an angle of 90 degrees.
20
Q
Find cos and csc
A
Cos=12/13
Csc=13/5
21
Q
Cos=(square root of 3)/2 find sin
A
Sin=1/2
22
Q
Sin^2(20)+cos^2(20)=1
A
0.16+0.88=1.04
23
Q
Tan50-sin50/cos50 solve using identities
A
Tan50-tan50
=0
24
Q
1-cos^2(20)-cos^2(70) solve using identities
A
1-sin^2(70)-cos^2(70)
=0
