Question

(cos A-1)(cos B-1)=2 prove that if A+B=π4​

Answer 1

Answer:

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To

The principal

XYZ public school

Jai vihar, New Delhi

Date = 3 December20XX

Respected Madam,

Subject :- Application for one day leave

I humbly request that I am a student of class X of your school. On returning home from school yesterday, my bicycle collided with a scooter, resulting in an injury to my hand. According to the doctor, it will definitely take at least 1 day to heal. Therefore, I will not be able to attend school one day. I request you to grant me leave on 4 December. The doctor's certificate is attached to the application.

Thank you

Yours obediently

Aakansha

Roll No - 47