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1 of 8
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Lesson
Practice
Choose a trigonometric ratio
DIFFICULTY
standard
QUESTION TYPE
Mix of all
Change
Side-pair diagram 1
Side-pair diagram 2
Side-pair diagram 3
NOW
Mix of all
Recommended
Question 1 of 8
No calculator
Triangle DEF. Right angle at F; marked acute angle theta at E. DF = 18 cm, DE = x cm. Not to scale.
x cm
18 cm
D
E
F
θ
Triangle DEF. Not to scale
1 mark
Which ratio uses the given and wanted sides?
Cosine
Sine
Tangent
CHECK
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