Question

sol fast ................imp h​

Answer 1

r is 180/2=90

now,

p+q+r = 180 ( sum of angles in a triangle)

p+q+90=180

p+q=180-90

p+q=90(divide the whole equation by 2)

p+q/2=90/2(or)

p/2+q/2=45(tan on both sides)

tan(p/2+q/2)=tan45

tan p/2 +tan q/2 =1

sum of roots =-b/a=1 (from above equation)

-b/a=1

now in the question

"which of the following are correct"

you did not give the following

hence i hope the above will help you

pl follow if it has helped you☺