Answer: This means that the altitude of the helicopter is 3925ft
Step-by-step explanation:we know the angle that is formed between the floor and the distance from the platform to the helicopter (73°)and we know the distance of the platform (1200 feet)at the angle we will call it αand at the distance of 1200 feet we will call it adjacentwe want to know the height that in this case would be the opposite leg to the angle we havewe see that it has (angle, adjacent, opposite)well to start we have to know the relationship between angles, legas and the hypotenusea: adjacento: oppositeh: hypotenusesin α = o/hcos α= a/htan α = o/ait's the tangenttan α = o/awe replace the values and solvetan α = o/atan 73 = o/12003.2708 * 1200 = oo = 3925