Professor husband (Namjin ff)

1.

IN COLLEGE

NAMJOON'S POV

2 new professors came both young and handsome it was the math class when the new professor came in . HOLY SHIT, HE LOOKS DO HANDSOME AND HOT

Sj: Good morning class. I am you new math professor
Class: Good morning sir
Jin: If any student has any doubt regarding math feel free to ask me
Class: Yes sir
Jin: Since its our first day together

ITS NOT I LOVE YOU PROFESSOR

Jin: We would go one further with our introduction

Class:

St1: I'm Kim Namjoon and i am till now the best ranker and i am also the class president
St2: I'm Min Yoongi and I'm good in music
St3: I'm Kim Taehyung and i'm good in art and crafts and also photography making me the school photographer
st4: I'm Lee Tom .........
st5: I'm Choi Dino ........
St6: i'm Kim Tisara .....
st7: i'm park Rara.......
st8: i'm Yang Elsa .......
St9: i'm Lim Dina........
St10: I'm Mi.... Park Jimin I'm good at contemporary dancing
St11: I'm Lee Key.......
St12: I'm Jung Hoseok And I'm good at Hip hop and modern dance

Elsa raised her hand

Elsa: Sir i have a query
jin: Sure
Elsa: Sir Are you single

HOW DARE SHE

Jin: No I'm not and my personal life is none of you r business and since you are so intersted in my life why don't you answer this question

Q Prove that (sin^4θ - cos^4θ +1) cosec^2θ = 2

Elsa: Sir i dont know I'm sorry

Hah got what you deserved bitch

Jin: who can solve this question
Nj: I know sir

I Went towards the board when he called me to solve it and i did it within 2 minutes

The Black board solution :

L.H.S.

= (sin^4θ - cos^4θ +1) cosec^2θ

= [(sin^2θ - cos^2θ) (sin^2θ + cos^2θ) + 1] cosec^2θ

""Using the identity sin^2A + cos^2A = 1""

=> (sin^2θ - cos^2θ + 1) cosec^2θ

=> [sin^2θ - (1 - sin^2θ) + 1] cosec^2θ

=> 2 sin^2θ cosec^2θ

=> 2 sin^2θ (1/sin^2θ)

=> 2 = 2

LHS = RHS