/
/
Rational
Irrational
Positive real number
None of the above
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
The angles of elevation of an artificial satellite measured from two earth stations are 30o and 40o respectively. If the distance between the earth stations is 4000 km, then the height of the satellite is:
2000 km
6000 km
1000 km
2828 km
For an acute angle ?, sin ? + cos ? takes the greater value when ? is:
30o
45o
60o
90o
The value of x for which sin (cot-1 (1+x))= cos (tan-1 x) is
1/2
1
0
-1/2
The minimum value of the expression sin ( + sin ( + sin (, where (, (,( are real numbers satisfying (+ (+(=( is
Positive
zero
negative
-3
/
Number of solutions of the equation tan x + sec x=2 cos x = 2cos x lying in the interval [0, 2():
0
1
2
3
3 (sin x- cosx)4 + 6 (sinx + cosx)2 +4 (sin6x+ cos6x)=
11
12
13
14