Integration of ∫sec x tan xdx is:
a) secx + c
b) tanx + c
c) cosx + c
d) sinx + c
i36 – 1/i27
a) 1 + 1/i
b) 1 – 1/i
c) i
d) 1
Explanation: i36 – 1/i27
=> (i2)18 – 1/(i2)13 × i
since i2 = -1
putting i2 = -1 we get
(-1)18 – 1/(-1)13 × i => 1 – 1/-1 × i
=> 1 + 1/i
Which of the following is the number represents repeated multiplication of the same variable?
a) exponent
b) power
c) both a and b
Explanation: x2 , 2 is an exponent or power.
If sinθ = ½ and cosθ = 3/2, then sin2θ = ?
a) 1
b) 2
c) ½
d) 3/2
General Science
Speed of sound in dry air at 200C is:
a) 332 m/s
b) 344 m/s
c) 356 m/s
d) 368 m/s
