These questions I got incorrect and would like detailed answered with steps to see what I did wrong and preferably typed answers for question 5 my mistake was that my slope shouldn't be equal to -1 and for 7 the mistake was I didn't show all steps and 8 i had some calc error

1|]. A ladder 15 n1 lung leans against The wall. The ladder slides d-ml'l'l The wall at a rate sf 1.5 nTT's. \"hat is The rate at sl'range or The angle at the ground when The ladder is E m from The well? {3 marks} 5. Find the equation of the tangent to the curve y = cos* x when * = Your solution 3 should use radian measure. (3 marks)