The sine and cosine ratios

Maths

Surds and trigonometry

Fill in the gaps: In a right-angled triangle, the ratio of the length of the side adjacent side to the length of the hypotenuse called the ...................

What is the sine ratio of a right angled triangle with angle 30 degrees?

Which image shows the sides of the triangle correctly labelled  (in relation to angle a)?

Complete the following: sine 30 = ..............

Fill in the gaps: In  a right-angled triangle, the sine of an acute angle is equal to the length of the side that is opposite to the angle, divided by the length of the …………………...

What is the length of the unknown side in the triangle below?

Which image shows the hypotenuse correctly labelled?

Which triangle shows the adjacent side to angle a?

Which triangle shows the opposite side to angle a?

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The sine and cosine ratios

Lesson outcome