Other word problems relating angles in trigonometry

Lesson: 1
5:59
Lesson: 2
8:55
Lesson: 3
5:24

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Other word problems relating angles in trigonometry

Basic Concepts: Use sine ratio to calculate angles and sides (Sin =

\frac{o}{h}

), Use cosine ratio to calculate angles and sides (Cos =

\frac{a}{h}

), Use tangent ratio to calculate angles and sides (Tan =

\frac{o}{a}

), Combination of SohCahToa questions

Lessons

1.
A bird is sitting in a 35 metre tall tree looking down at a worm on the ground. If the angle of depression from the bird to the ground is $55^\circ$ , how far is the bird from the worm?

2.
Standing on the balcony of an building A, the angle of elevation to the top of the building B across the street is $47^\circ$ , and the angle of depression to the bottom of the building B is $58^\circ.$ If the buildings are 42 metres apart, find the height of the building B across the street.

3.
If the volume of the cube below is 512 $cm^3$ , what is the length of AB?

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