Sine and Cosine Laws, Class 11 Mathematics NCERT Solutions

1. There will be total 10  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1.

a²=b²+c²-2bc.cos A

a²=b²+c²-2bc.cos B

a²=b²-c²-2bc.cos A

a²=b²+c²+2bc.cos A

Question 1 of 10

2. In the given figure, X will be

9.73

22.3

24.

4.

Question 2 of 10

3. Law of cosineis applicable if we know

All three sides of triangle

two angle and sides included

All three angles

(a) and (b) both

Question 3 of 10

4. Law of cosine can be applied to

only right angled triangle

equilateral triangle

Isosceles triangle

All types of triangle

Question 4 of 10

5. Find angle A in the following figure

43°30'

40°30'4"

45'

46°36'2"

Question 5 of 10

6. What is the length of side c

3.58

4.58

4.89

4.56

Question 6 of 10

7. What is the length of side b.

7.16

7.74

2.83

4.35

Question 7 of 10

8. 2(bc cos A+ ca cos B + ab cos C)=

a²+b²+c²

abc

2abc

a²+b²-c²

Question 8 of 10

9. A.   B.   C.   D.   

A

B

C

D

Question 9 of 10

10. Two ships A and B, lies 33 m apart on the sea surface. There is submarine 'C' on the sea bed. The angle of depression of C from A is 60o and the distance AC is 40 m. Calculate the distance BC.

51.9m

37.0m

20.1m

63.3m

Question 10 of 10

 Loading...