Cosine Ratio

Calculate the cosine of the following angles to two decimal places.

(a)Cos 54

(b) cos 78

Find angle X to the nearest degree

(a) Cos X=0.65

(b) Cos X =7/5

Using the following triangle, calculate cos D to two decimal places.

Find the value of "x" using cosine

Calculate angle B and cos B for the following triangle. Round the angle

measurement to the nearest degree.

Find the measurement of the missing side of the triangle to the

nearest tenth of a metre.

If a right triangle has a hypotenuse that is 18 cm long, how long is the

side adjacent to the 17° angle (nearest tenth of a centimetre)?

A family built a patio on the second storey of their home. They

wanted to be able to access their backyard from this patio, so they built

stairs from the patio to the grass. The incline of their staircase from the

ground to the patio was 56° and the height of the staircase from the

patio to the ground was 5 m. To the nearest tenth, calculate the length

of the staircase.