4.8 Solving Problems with Trig_NOTES.notebook 1 November 11, 2012 Before we learn how to solve PRECALCULUS level trigonometric problems, let's review your trigonometric skills from Geometry... THERE ARE RIGHT TRIANGLES ALL AROUND US! Before we learn how to solve PRECALCULUS level trigonometric problems, let's review your trigonometric skills from Geometry... Use the diagram to find the length across the suspension bridge Trigonometry is useful in finding the lengths that are difficult to measure. Observe... A pilot must approach an airport at a descent angle (angle of depression) of 11 degrees toward the runway. If the plane is flying at an altitude of 3200 ft, what distance (d, in miles) along the ground should the pilot start the descent? A tent is supported by a cable stretched between two poles at a height of 80 inches. The sides of the tent make an angle of 58 degrees with the ground. How wide is the tent at the bottom?