Extra Credit Cofunctions and Trig Problems Monday, May 11, 2020 Name: Date: 1. When instructed to find the length of HJ in right triangle HJG, Alex wrote the equation sin 28" = while Marlene wrote cos 62 = 20' _HJ Are both students' equations correct? Explain why. 20 280 G 2. David has just finished building his treehouse and still needs to buy a ladder to be attached to the ledge of the treehouse and anchored at a point on the ground, as modeled below. David is standing 1.3 meters from the stilt supporting the treehouse. This is the point on the ground where he has decided to anchor the ladder. The angle of elevation from his eye level to the bottom of the treehouse is 56 degrees. David's eye level is 1.5 meters above the ground. 56 1.5 m 56 1.5 m 1.3 m 1.3 m Determine and state the minimum length of a ladder, to the nearest tenth of a meter, that David will need to buy for his treehouse. page 1