Topics
Trigonometry
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CanadaON
Grade 10

Identify sine, cosine and tangent ratios

Lesson
Practice

Interactive practice questions

Write down the ratio of the sides represented by $\sin\theta$sinθ.

A right-angled triangle, $\triangle ABC$△ABC, has its right angle, $\angle ACB$∠ACB, at vertex $C$C as indicated by a small blue square. The side $AB$AB, which is also the hypotenuse, is opposite the right angle $\angle ACB$∠ACB.

The angle at vertex $B$B, $\angle ABC$∠ABC, is marked with a double blue arc, and is labeled as $\theta$θ. The vertical side $AC$AC is opposite $\angle ABC=\theta$∠ABC=θ and the horizontal side $BC$BC is adjacent $\angle ABC=\theta$∠ABC=θ. The angle at vertex $A$A, $\angle BAC$∠BAC, is marked with a single blue arc and is labeled as $\alpha$α.
Easy
1min

Write down the ratio represented by $\cos\theta$cosθ.

Easy
< 1min

Write down the ratio represented by $\sin\theta$sinθ.

Easy
< 1min

Write down the ratio represented by $\cos\theta$cosθ.

Easy
< 1min
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Outcomes

10D.T2.01

Determine, through investigation , the relationship between the ratio of two sides in a right triangle and the ratio of the two corresponding sides in a similar right triangle, and define the sine, cosine, and tangent ratios

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