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Intro to Trigonometry Flashcards | StudBud
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Intro to Trigonometry
Intro to Trigonometry
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1
What is sin(60°)? SOH
\frac{1}{2}
\sqrt{3}
\frac{\sqrt{3}}{2}
2
2
Which quantities should we label and which ratio to use?
O and H --> SOH --> sin
O and A --> TOA --> tan
A and H --> CAH --> cos
3
Which statement is FALSE?
This question has "A" and "H" and is related to cosine
𝒙 hypotenuse (longest); to find 𝒙, multiply 15\times\cos\left(75\right)
x=\frac{15}{\cos\left(75\right)}
The side that does NOT be labelled is "O" for "Opposite"
4
What is cos(30°)? CAH
\sqrt{3}
2
\frac{\sqrt{3}}{2}
\frac{1}{2}
5
Which quantities should we label and which ratio to use?
A and H --> CAH --> cos
O and H --> SOH --> sin
O and A --> TOA --> tan
6
Which quantities should we label and which ratio to use?
A and H --> CAH --> cos
O and H --> SOH --> sin
O and A --> TOA --> tan
7
Label the side marked with "x" relative to the angle θ
Opposite
Hypotenuse
Adjacent
8
What is tan(30°)? TOA
2
\sqrt{3}
\frac{1}{2}
\frac{1}{\sqrt{3}}
9
Label the side marked with "x" relative to the angle θ
Opposite
Adjacent
Hypotenuse
10
Label the side marked with "x" relative to the angle θ
Adjacent
Opposite
Hypotenuse
11
What is sin(30°)? SOH
\frac{\sqrt{3}}{2}
\frac{1}{2}
2
\sqrt{3}
12
When finding out quantity 𝒙, we should do
x=\frac{3}{15}
x=15\times3
x=\frac{15}{3}
13
Label the side marked with "x" relative to the angle θ
Opposite
Hypotenuse
Adjacent
14
Same ramp, actual ramp is 8 metres long and rises 4 metres. In the photo, it is 6cm long,
how high does it rise?
3 cm
cannot be determined
2 cm
4 cm
15
Label the side marked with "x" relative to the angle θ
Hypotenuse
Opposite
Adjacent
16
Which sides are relevant here, and which ratio to use? SOH-CAH-TOA
O and A --> TOA --> tangent
A and H --> CAH --> cosine
O and H --> SOH --> sine
17
For the following formula triangle, which statement is INCORRECT?
12=4\times3
4=12\times3
4=\frac{12}{3}
3=\frac{12}{4}
18
Which quantities should we label and which ratio to use?
O and A --> TOA --> tan
A and H --> CAH --> cos
O and H --> SOH --> sin
19
When finding out quantity c, we should do
\frac{a}{b}
\frac{b}{a}
a\times b
20
True/False: The values of sin and cos for 45° angles are the same: SOH and CAH
True
False
21
If you have a photo of a disabled ramp,
what is the angle
marked with question mark?
smaller θ
bigger than θ
same as θ
cannot be determined
22
How do you feel about Trigonometry
What's trigonometry?
I learnt a little in the past but struggled, and now forgotten a lot.
No problem! I solve Trig questions in all types of shapes & functions
I can solve basic trig questions in right-angle triangles
23
When finding out quantity c, we should do
\frac{a}{b}
\frac{b}{a}
a\times b
24
What is cos(60°)? CAH
\frac{\sqrt{3}}{2}
2
\sqrt{3}
\frac{1}{2}
25
What is tan(60°)? TOA
\sqrt{3}
\frac{1}{\sqrt{3}}
2
\frac{1}{2}
26
Label the side marked with "x" relative to the angle θ
Hypotenuse
Adjacent
Opposite
27
Which quantities should we label and which ratio to use?
O and A --> TOA --> tan
A and H --> CAH --> cos
O and H --> SOH --> sin
28
Which quantities should we label and which ratio to use?
O and A --> TOA --> tan
A and H --> CAH --> cos
O and H --> SOH --> sin
29
Label the side marked with "x" relative to the angle θ
Opposite
Adjacent
Hypotenuse
30
Label the side marked with "x" relative to the angle θ
Adjacent
Opposite
Hypotenuse
31
Choose the
Wrong
statement
We use the cosine formula for this question
x=\cos\left(\frac{11}{15}\right)
x=\cos^{-1}\left(\frac{11}{15}\right)
\cos\left(x\right)=\frac{11}{15}
32
Which quantities should we label and which ratio to use?
O and H --> SOH --> sin
A and H --> CAH --> cos
O and A --> TOA --> tan
33
When finding out quantity 𝒙, we should do
x=\frac{3}{15}
x=15\times3
x=\frac{15}{3}
34
What is tan(45°)? TOA
\sqrt{2}
1
\frac{1}{\sqrt{2}}
35
Which is the correct representation of this ratio?
θ=\frac{10}{11}
\cos\left(θ\right)=\frac{10}{11}
\cos\left(θ\right)=11\times10
\cos\left(θ\right)=\frac{11}{10}
36
Which quantities should we label and which ratio to use?
O and A --> TOA --> tan
A and H --> CAH --> cos
O and H --> SOH --> sin
37
Which quantities should we label and which ratio to use?
A and H --> CAH --> cos
O and A --> TOA --> tan
O and H --> SOH --> sin
38
Label the side marked with "x" relative to the angle θ
Hypotenuse
Adjacent
Opposite
39
When finding out quantity 𝒙, we should do
x=\frac{3}{15}
x=15\times3
x=\frac{15}{3}
40
Which side is "adjacent"?
R
B
yellow
41
When finding out quantity c, we should do
\frac{a}{b}
\frac{b}{a}
a\times b
42
Which quantities should we label and which ratio to use?
O and H --> SOH --> sin
A and H --> CAH --> cos
O and A --> TOA --> tan
43
Which colour side is "Opposite"?
Yellow
Red
Blue
