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Cube Roots of Unity
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If a > 0, then function ƒ(x) = ax² + bx + c has a minimum value at
ƒ(-a/2b)
None of above
ƒ(a/2b)
ƒ(-b/2a)
Central angle of an arc of a circle whose length is equal to radius of circle is called the
Second
Radian
degree
minute
Period of sin(x)/2 is
None of above
π
4π
2π
If ω is imaginary cube root of unity, then ω =
2ω
1
ω-2
If ω is imaginary cube root of unity, then ω =
ω-2
1
2ω
Sin3θ/sinθ +cos3θ/cosθ =
cosθ
sinθ
2cot2θ
Sin3θ/sinθ +cos3θ/cosθ =
cosθ
2cot2θ
sinθ
Common difference of sequence 5,8,11,14,… is
1
3
−3
Common difference of sequence 5,8,11,14,… is
−3
3
1
If ƒ(x) = 2x+1/x-1, then f-1
(1) =
−1
1
−2
If f is a bijective function, then ƒ(f-1(x)) =
2
1
x
Cosh²x + sinh²x =
cosh(2x)
sinh(2x)
−cosh(2x)
tanh(2x)
If one root of equation x² - 3x + a = 0 is 2, then
a = -3
a = -2
a = 2
a = 0
Cos²θ+sin²θ =
−2
−1
1
Value of 10C4 x 8C3 is
11760
12760
9760
10760
An arrangement of finite numbers of objects taken some or all at a time is called their
combination
permutation
A.P
Sequence
For a quadratic equation ax² + bx + c sum of root is
b/a
None of above
c/a
−b/a
1
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