Use $\sin,\cos$ and $\tan$ for problem solving A model helicopter takes off from the horizontal ground with a constant vertical speed of $5$ m/s. After $10$ seconds the angle of elevation from Sione to the helicopter is $62$ degrees. If Sione is $1.8$ m tall, how far is the helicopter from his head at this instant? **Attempt** What I did ![enter image description here]( "The I represents Sione and I need to find the distance from $x$ to the tip of the triangle." Is this diagram correct? Thanks

I think that the correct diagram is this (not drawn to scale):


•
/|
/ |
d / |
/ | 48.2 50
/ |
/ |
/ 62° |
•——————•
________ 1.8


The bottom left corner of the triangle is Sione's head and the top corner is the current location of the helicopter. The line at the bottom is the ground. So, $d$ is the distance between Sione's head and the helicopter.

It's very easy to solve for $d$ now.