Question

ST. MARY'S SR. SEC. SCHOOL, GURSARAI
TERM-I EXAMINATION 2020 - 21
SUBJECT - MATHEMATICS - (041|
CLASS - X
M.M. 15
Time: 40:00
SECTION - B
Artempt any 5 of the following questions: -
1513-15)
1. Find the value of k for which the equation x? +k(2x +k-1) +2 -0 has real and
equal roots
2. (SinA-cosA + 1) (sinA + COSA-1)=1/(secA - tanA).
3. if cosec 0 + cot 9 = 9. show that cosec 8-cote=1/4 and hence find the values of sin
Band sec
4. Amit bought two pencils and three chocolates for 11 and Sumeet bought one pencil
and two chocolates for 37. Represent this situation in the form of a pair of linear
equations. Find the price of one pencil and that of one chocolate graphically.
5. The owner of a taxi company decides to run all the taxis on CNG fuel instead of
petrol/diesel. The taxi charges in city comprises of fixed charges together with the
charge for the distance covered. For a journey of 13 km, the charge paid is 129 and
journey
of 22
the charge paid is 3210
What will a person have to pay for travelling a distance of 32 km?
6. Triangle ABC, is right angled at C. If p is the length of the perpendicular from C to
AB and a, b, c are the lengths of the sides opposite Angle A, Angle B. Angle C
respectively then prove that
1
6²
3​

Answer 1

Step-by-step explanation:

it is soooo much cojusted

didn't understand

Answer 2

Answer:

Hii

Step-by-step explanation:

You have to question one by one because these are to much . Again you can ask but one by one.