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G9Trigonometry
G9Trigonometry
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Answers
1
2sin
2
x+2cos
2
x=
0
4
1
2
2
Find the angle of the triangle using trigonometry:
48.03
40.83
49.17
33.18
3
using a calculator round tan(55°) to the nearest hundredth
1.4
1.428
1.42
1.43
4
tan(x)=
adj/opp
sin(x)/cos(x)
sin(x)+cos(x)
cos(x)/sin(x)
5
x is an acute angle then sin(x) could be 1.02?
True
False
6
if sin(x)=√3/2 then cos(x)=
2/3
1/2
3/2
2.5
7
which angle doesn't have a tangent ratio
45
90
0
30
8
If angles a and b are complementary then
tan(a)=tan(b)
sin(a)=cos(b)
cos(a)=cos(b)
a=b
9
which angle has equal sin and cosine ratios?
60
45
30
90
10
can we find an angle x such that tan(x)=1.2
i have to ask a friend
no since 0<sin(x)<1
no,since tan(x) should be less than 1
yes,since tan(x) could be any number,
11
sin(37)=
sin(43)
sin(53)
cos(43)
cos(53)
12
1+tan
2
x=
1+sin2x
1/sin2x
1/cos2x
1+cos2x
13
x is an angle such that sin(x)=0.73 then what is x rounded to the nearest degree?(calculator)
46.9
46
46.89
47
14
ABC is a triangle right at A then which of the following is true?
BC=AB*cos(40)
AB=AC*tan(40)
BC=AC*cos(40)
AC=AB*tan(40)
15
in a right triangle ,let x be one of the acute angles then
sin(x)=opp/adj
tan(x)=opp/hyp
cos(x)=adj/opp
tan(x)=opp/adj
16
tan
2
x/(1+tan
2
x)=
1+tan2x
sin2x
tan2x
cos2x
17
which rule is always true :
sin2x+cos2x=1
sin(x)+cos(x)=1
sin2x-cos2x=1
tan(x)=cos(x)/sin(x)
18
cos(0)=
1
3
3
0
19
(sinx+cosx)
2
-2*sin(x)*cos(x)-1=
sin(x)
0
1
cos(x)
20
Find the length of the missing side using SOHCAHTOA
.053
9.02
11.97
8.72
21
For what type of triangles are Trigonometric Functions defined?
Acute triangles
Right triangles only
Scalene triangles only
All sort of triangles
22
Trigonometric functions are used to
finding the missing angle of a right triangle
Both 1 and 2
finding the missing side of a right triangle
none of the above
23
Trigonometry deals with functions applied on
angles
sides
volumes
areas
