Question

Please explain me how it happened? I'm really confused about it. Solution is already done but I cannot understand that how 90° - 75°30' became 89°60' - 75°30' . Here, what is the 30' and 60' ?
In simple words, I cannot understand anything about the solution.Explain me each term of the solution.​

Answer 1

Answer:

1°=60' (60 minutes)

1'=60"(60seconds)

Answer 2

Answer:

di

prerna loves ni usne propose bhi Kiya Kal

And I also know sachu

shivu bhaiya

sabko janta hu mai bas aapse kabhi baat ni ki