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The angle of elevation to the top of a tree is 63 degrees. Given that the distance to the tree is 15 m and your height is 1.6 m, how tall is the tree?

Drawing a diagram for this would show that the height of the tree above us is given by tan(63)*15, so the total height is this added to 1.6 m. This gives a height of 31 m.

Answered by Lucy V. • Maths tutor

3522 Views

Describe the processes in the formation of a coastline.

headlands and bays: differences in rock strength and resistance to erosion, different erosion rates = headlands and bays.cracks and caves forming from erosion, both sides of the headland.An arch forms.Roo...

Answered by Polly R. • Geography tutor

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An electromagnetic wave has a wavelength of 3.0m and a speed of 3x10^8 m/s. State what type of radiation this wave is and calculate the period of the wave.

For the first part we know that the wavelength is over 1.0 m so it is a radio wave.To find the period we first find the frequency as the period is the reciprical of the frequency. (T = 1/f).To find the fr...

Answered by Anna P. • Physics tutor

9014 Views

Solve the following simultaneous equations. x^2+y^2=25. y-3x=13

The key to solving simultaneous equations is trying to reduce them into one equation. You can see that one of these equations is quadratic, so you should be thinking there will be 2 answers for x and y. Y...

Answered by Ben W. • Maths tutor

5554 Views

Solve these two simultaneous equations.

eq.1 4x+3y=7eq.2 3x+7y=16
You want to eliminate one of the variables (either x or y) reducing the problem to just one equation with one variable which can be solved. This can be done by multiplying e...

Answered by Tobias H. • Maths tutor

4569 Views