/
Rational
Irrational
Positive real number
None of the above
radians is equal to:
108
54
100
81
In the following figure, if BC=8 cm, AB=6cm, AC=9cm,then DC is equal to:
/
7 cm
7.2 cm
4.8 cm
4.5 cm
Cos((-()=1 and cos((+() =1/e where (, ( ( [-(,(]. Paris of (, ( which satisfy both the equations is/are
0
1
2
4
/
t1 > t2 > t3 >t4
t4 > t3 > t1 >t2
t3 > t1 > t2 >t4
t2 > t3 > t1 >t4
The number of all possible triplets (a1, a2, a3) such that a1 + a2 cos(2x) +a3sin2(x)=0 for all x is
zero
one
three
infinite
/
The value of the expression cosec 20o – sec 20o is equal to
2
2 sin 20o/sin 40o
4
4 sin 20o/sin 40o
3 (sin x- cosx)4 + 6 (sinx + cosx)2 +4 (sin6x+ cos6x)=
11
12
13
14
A ladder reaches a window which is 12 m above the ground on one side of the street. Keeping its foot at the same point, the ladder is turned to the other side of the street to reach a window 9 m high. Find the width of the street, if the length of the ladder is 15m.
21 m
12 m
9 m
None of these