Baka to Test to Shoukanjuu

V1: The Fourth Question

Please answer the following questions:

(1) What value of X satisfies the equation 4 sin X + 3 cos 3X = 2 and is found in the first quadrant?

(2) Which one of the following expressions is equivalent to sin (A+B)?

① sin A + cos B

② sin A – cos B

③ sin A cos B

④ sin A cos B + cos A sin B

Himeji Mizuki's Answer:

(1) X = π/6

(2) ④

Teacher's Comment:

That's right. You can write the angle with the symbol π instead of °. Your answer is perfect.

Tsuchiya Kouta's Answer:

(1) X = probably 3

Teacher's Comment:

I think you're trying to slack off by saying "Probably". Even though you're close, I can't give you credit.

Yoshii Akihisa's Answer:

(2) Probably ③

Teacher's Comment:

I have seen plenty of students' attempts before, but you're the first who tried to slack off on a multiple-choice question like this.

"Yoshii! Kinoshita's troop started the fight with Class D in the corridor!"

With her ponytail swinging behind her, Shimada, who was placed in the same troop I was, ran towards me. Under careful observation, you could see that she was tall, with long legs, so why doesn't she look like a girl? Which part of her was wrong?

"Ah, maybe it's the flat chest?"

"Let me break your fingers one by one! Evenly!"

Oh, no, I think I just stepped on a landmine.

"L-Let's just stop there. We need to focus on the War!"

The troop that was fighting on the frontlines was the vanguard led by Kinoshita. The backup troop we're in was located between the frontlines and Class F. I don't remember accepting an offer to be troop leader, but now I have to take the responsibility to lead everyone, so I need to focus.

First, we need to get a feel for the atmosphere of battle. If I listen closely, I think I can hear sounds of battle coming from the vanguard troop.

"Now Come! You Loser Dog!"[1]

"I... Ironman? No! I don't want to go to the remedial room!"

"Shut up! The prisoners of war will be staying in the remedial room and will be specially lectured until the battle ends! I'm not sure how long it will take to end, but it looks like I'll have enough time to lecture you!"

"P-Please, let me go! I don't have the confidence to get through the torture!"

"Torture? That's not true. It's just a marvelous educational lecture. By the time it's over, I'll have educated you into a standard student whose hobby is studying, just like Ninomiya Kinjiro[2]!"

"D-devil! Someone help me...! No...!!!" *Door closing*

OK, now I have a good understanding of what a Summoner Test War is.

"Shimada, give the order to the troop."

"OK? What order? What do you want me to say?"

During a dangerous time like this, there is only one order I can give: