Chapter 6: Trigonometric Ratios - Math Mcqs for Grade 8 - Set 1

1)   A ladder leans against the wall at the point B (window end) from a ground level and makes an angle horizontally at 52°. The height of ladder is 15 m. When the same ladder leans above the point B at point A (window start) and makes an angle of 85° horizontally. The distance between point A and point B is

a. 12.4 m
b. 5 m
c. 4.12 m
d. 3.12 m
Answer  Explanation 

ANSWER: 3.12 m

Explanation:
No explanation is available for this question!


2)   Considering a right-angled triangle ABC, if opposite side is 'x' and adjacent side of triangle is equal to 20 then A 53° is

a. 23.46
b. 24.46
c. 26.54
d. 28.64
Answer  Explanation 

ANSWER: 26.54

Explanation:
No explanation is available for this question!


3)   The answer of sin 95.29° is

a. 0.7955
b. 0.9957
c. 0.5957
d. 0.5997
Answer  Explanation 

ANSWER: 0.9957

Explanation:
No explanation is available for this question!


4)   If sin A is 0.865 then the value of angle A (four significant figures) is

a. 85.59°
b. 59.88°
c. 62.88°
d. 88.62°
Answer  Explanation 

ANSWER: 59.88°

Explanation:
No explanation is available for this question!


5)   The measurements such as length of book and width of glass sheet by using measuring tape are called

a. indirect measurements
b. direct measurements
Answer  Explanation 

ANSWER: direct measurements

Explanation:
No explanation is available for this question!


6)   Considering a right-angled triangle ABC, if opposite side is '12' and adjacent side of triangle is supposed as 'x' then A 48° is

a. 15.31
b. 17.31
c. 18.31
d. 19.31
Answer  Explanation 

ANSWER: 15.31

Explanation:
No explanation is available for this question!


7)   Consider a right angle triangle XYZ, XY = a, YZ = b, XZ = 25.6 and angle of X is 37° then the values of a and b respectively are

a. 19.604, 40.045
b. 18.604, 42.025
c. 17.406, 21.455
d. 15.406, 20.445
Answer  Explanation 

ANSWER: 15.406, 20.445

Explanation:
No explanation is available for this question!


8)   The sin P of triangle PQR with respect to P is calculated as

a. QR/PQ
b. QR/PR
c. PQ/PR
d. PR/PQ
Answer  Explanation 

ANSWER: QR/PR

Explanation:
No explanation is available for this question!


9)   A bundle of 10 balloons has string of 35 cm attached to it and makes and elevation angle of 40°. The distance of balloons from the holders hand is

a. 38.50 cm
b. 25.50 cm
c. 22.50 cm
d. 32.50 cm
Answer  Explanation 

ANSWER: 22.50 cm

Explanation:
No explanation is available for this question!


10)   The height of a light house is 65 m. The angles of elevation and depression of the top and foot of a radar mast are 52° and 30° respectively. The height of radar mast is

a. 102 m
b. 305 m
c. 209.09 m
d. 109.09 m
Answer  Explanation 

ANSWER: 209.09 m

Explanation:
No explanation is available for this question!