```“So the sine of an angle is the ratio of opposite side to the hypotenuse.”
“It’s the ratio of their lengths in a right angled triangle right?”
“Yup.”
“Cosine is the ratio of adjacent side to the hypotenuse.” I explained. I have been teaching John about trigonometric functions after school.
“Ok. Now I am getting something.”
“Just imagine a triangle and take an angle other than right angle. Then you can know these easily.”
“Yeah. Hey thanks for this. I know you didn’t have to do this.”
“It’s ok.” I started to blush. Get it together. He’s just saying thanks.
“So. I see you like maths.”
“Yeah. I do.”
“It’s good that I have a friend who’s a math genius.”
“I am not that much of a genius.” I said.
“There’s not much to tell. I live with my mom. I am her only child. No siblings.”
“He passed away before I was born” I said.
“I am sorry”.
“It’s ok. I never knew him.”
“But you wish you knew.”
“Yeah.” I said looking at him. He is so insightful. I thought.
“So. What else do like to do. I mean like your hobbies?”
Why is he asking me these questions?
“Oh. Nothing special. Just watching TV and listening music in free time.” Oh. I also daydream about kissing you and occasionally I shapeshift into other people.
We talked sometime. He said he lived with his mom and dad. He had an older sister who was a cop. Now that was something new.
“So. See you at school tomorrow.” He started to leave.