TCS Company Numerical Ability Percentage

Find the value of sin 75° + sin 15° = ?
cos 75° + cos 15°
a) 1
b) 2
c) √3/2
d) Cannot be determined
e) None of these

Read Solution (Total 3)

sinA+sinB=2sin(A+B/2)cos(A-B/2)
so answer is 2sin45 cos30 =sqrt(3/2)
9 years agoHelpfull: Yes(5) No(0)

1
sin 75+sin 15=1.22
cos 75+cos 15=1.22
9 years agoHelpfull: Yes(2) No(0)
we know the property sinA=cos(90-A)
sin75=cos15
sin15=cos75
Then final answer=1
8 years agoHelpfull: Yes(1) No(0)

TCS Other Question

In T.Nagar the buildings are numbered from 1 to 100. How many 6’s will be present in the numbers?
a) 18
b) 19
c) 20
d) 21
e) None of these
From the top of a 9 metres high building AB, the angle of elevation of the top of a tower CD is 30° and the angle of depression of the foot of the tower is 60°. Find the height of the tower?
a) 9m
b) 18m
c) 20m
d) 27m
e) None of these