Maths
posted by Shane .
Please I need help.Iam stuck with this question.Using sine and cosine rule: A rocket launced vertically from L is observed from A. Soon after launch when at position M its angle of elevation is 25 degree. After it climbs 4000m from this position to N its angle of elevation is 66 degree. (a) Find angle ANL and angle NAM (b) Use the sine rule to find AM. (c) Find how far the observer is from the launching pad.

clearly ANL=24 and NAM=41
4000/sin41 = AM/sin24
AL/AM = cos25