HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

You have chosen Computer Science in the Higher Secondary Course. Write a letter to your friend giving reasons for your choice. Read the clues given in brackets to complete the letter.

______(Greeting),

Hope ______ (enquire about his well being). I would like to______ Firstly______(reason for your choice of group). I wish... (state your ambition). We come to hear______ (discuss recent unhealthy happenings in social media and the society). These have made me______ (demand or need of this profession). I have plans to pursue______ (higher studies or specialization).

All the best for your CA preparation. Convey my ______

Yours lovingly,

(your name)

You had been to your Grandma’s house during the summer holidays. You enjoyed your stay in her company. Write a letter to your Grandma stating how much you miss her after returning to your home.

You are the head of the English department in a renowned institution. You are invited to preside over the inauguration of the English Literary Club in your alma mater. Respond to the letter you have received either accepting the invitation or expressing your inability to attend the function.

Write a letter to the Headmaster of your school requesting him to help you obtain a duplicate mark sheet of class XII, which you lost while travelling

Write a letter to AZ Company requesting them to replace the defective juicer that you bought recently. Include the following details: the problem, date of purchase, receipt number, model and warranty

You wish to become a pilot. Write a letter to a college enquiring about the details of the pilot training course offered by the college. Include the following details in your enquiry: duration of the course, fee structure, scholarships, hostel facilities, and placement details.

Write a letter to the manager of Waves Furniture Company ordering furniture for a coaching centre. Include the following details: description of the furniture, number of pieces, mode of payment, time and delivery options.

Write a letter to the Editor of a newspaper about the nuisance created by the roadside vendors blocking the pavements and occupying the parking zone.

Write a letter to your relative or friend who is admitted in hospital for treatment of jaundice. Advise him/her not to worry about the illness and be positive. Assure him/her of your psychological and financial help during the crisis.

A man standing directly opposite to one side of a road of width x meter views a circular shaped traffic green signal of diameter ‘a’ meter on the other side of the road. The bottom of the green signal Is ‘b’ meter height from the horizontal level of viewer’s eye. If ‘a’ denotes the angle subtended by the diameter of the green signal at the viewer’s eye, then prove that α = `tan^-1 (("a" + "b")/x) - tan^-1 ("b"/x)`

If the sides of a cubic box are increased by 1, 2, 3 units respectively to form a cuboid, then the volume is increased by 52 cubic units. Find the volume of the cuboid

Find all the values of x such that – 10π ≤ x ≤ 10π and sin x = 0

Find all the values of x such that Find all the values of x such that −3π ≤ x ≤ 3π and sin x = −1

Find the period and amplitude of y = sin 7x

Find the period and amplitude of y = `- sin(1/3 x)`

Find the period and amplitude of y = 4 sin(– 2x)

Sketch the graph of y = `sin(1/3 x)` for 0 ≤ x ≤ 6π

Find the domain of the following

`f(x) = sin^-1 ((x^2 + 1)/(2x))`

Find the domain of the following

`g(x) = 2sin^-1(2x - 1) - pi/4`

Choose the correct alternative:

`sin^-1(cos x) = pi/2 - x` is valid for