OpenStudy (anonymous):

John measured the angle of elevation to the top of a tower as 50°. He walked 20 m towards the tower and measured the angle of elevation as 65°. Calculate the height of the tower to the nearest centimetre. Please explain the answer. One sec, I'll be clipping a diagram of what I got so far.

3 years ago
OpenStudy (anonymous):

|dw:1402360771737:dw| Please use sine rule.

3 years ago
OpenStudy (anonymous):

That's not the diagram provided, that's my workings out

3 years ago
OpenStudy (tkhunny):

Do you mean they may not APPEAR to be Right Angles? If they are not Right Angles, why are you using the sine function? |dw:1402373259660:dw|

3 years ago
OpenStudy (anonymous):

I don't know, I'm using the sine rule. a/sinA = b/sinB = c/sinC

3 years ago
OpenStudy (tkhunny):

Why? It seems a tangent would be more appropriate.

3 years ago
OpenStudy (anonymous):

The course I'm doing is about the sine rule. :/

3 years ago
OpenStudy (tkhunny):

|dw:1402373880871:dw| Okay, where does that leave us?

3 years ago