MCQ
Max. and Min. value of expression $2sin^2\theta\,  -\, 3sin\theta $ respectively is
  • $5, -\frac {9}{8}$
  • B
    $0,- \frac {9}{8}$
  • C
    $0,-1$
  • D
    $-1, -\frac {9}{8}$

Answer

Correct option: A.
$5, -\frac {9}{8}$
a

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Suppose $A_1, A_2, ..., A_{30}$ are thirty sets each having $5$ elements and $B_1, B_2, ...,$ Bn are $n$ sets each with $3$ elements$,$ let $\bigcup\limits_{\text{i}=1}^{30}\text{A}_\text{i}=\bigcup\limits_{\text{j}=1}^\text{n}\text{B}_\text{j}=\text{S}$ and each element of $S$ belongs to exactly $10$ of the $A_i ’s$ and exactly $9$ of the $B, 'S.$ then $n$ is equal to.
If ${z^2} + z + 1 = 0$, where $z$ is complex number,then the value of  ${\left( {z + \   \frac{1}{z}} \right)^2} + {\left( {{z^2} + \frac{1}{{{z^2}}}} \right)^2} + {\left( {{z^3} + \frac{1}{{{z^3}}}} \right)^2} + \ldots + {\left( {{z^6} + \frac{1}{{{z^6}}}} \right)^2}$ is
Let $A$,$B$ and $C$ be three events such that $P\left( {A \cap \bar B \cap \bar C} \right) = 0.6$, $P\left( A \right) = 0.8$ and $P\left( {\bar A \cap B \cap C} \right) = 0.1$, then the value of $P$(atleast two among $A$,$B$ and $C$ ) equals
The roots of the given equation $2({a^2} + {b^2}){x^2} + 2(a + b)x + 1 = 0$ are
The solution set of the equation ${x^{{{\log }_x}{{(1 - x)}^2}}} = 9$ is
Let the equations of two adjacent sides of a parallelogram $A B C D$ be $2 x-3 y=-23$ and $5 x+4 y$ $=23$. If the equation of its one diagonal $AC$ is $3 x +$ $7 y=23$ and the distance of A from the other diagonal is $d$, then $50 d ^2$ is equal to $........$.
Two women and some men participated in a chess tournament in which every participant played two games with each of the other participants. If the number of games that the men played between themselves exceeds the number of games that the men played with the women by $66$, then the number of men who participated in the tournament lies in the interval
If $\tan\alpha=\frac{1-\cos\beta}{\sin\beta},$ then:
The value of $\tan 3 A-\tan 2 A-\tan A$ is :
If $A = (6, 7, 8, 9), B = (4, 6, 8, 10)$ and $C = \{x : x \in N : 2 < x ≤ 7\}$ ; find: $A - B$