Download App

Model Paper 4 — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsModel Paper 41 Mark
MCQ
$\sin 75^{\circ}=?$
  • A
    $\frac{(\sqrt{2}-1)}{2 \sqrt{2}}$
  • B
    $\frac{(\sqrt{3}-1)}{2 \sqrt{2}}$
  • C
    $\frac{(\sqrt{3}+1)}{2 \sqrt{2}}$
  • D
    $\frac{(\sqrt{2}+1)}{2 \sqrt{2}}$
✓

Answer

(c) $\frac{(\sqrt{ } 1+1)}{2 \sqrt{2}}$
Explanatien: $\sin 75^{\circ}=\sin \left(90^{\circ}-15^{\circ}\right)=\cos 15^{\circ}=\frac{(\sqrt{3}+1)}{2 \sqrt{2}}$

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

Explore more

More "M.C.Q (1 Marks)" from Model Paper 4→Model Paper 4 — all question types→Maths STD 11 Science question papers→CBSE Board STD 11 Science question papers→CBSE Board question paper generator→

Similar questions

The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is:
→
${n^n}{\left( {\frac{{n + 1}}{2}} \right)^{2n}}$ is
→
If sum of infinite terms of a $G.P.$ is $3$ and sum of squares of its terms is $3$, then its first term and common ratio are
→
Let $S$ be the set of all points $\left(\frac{a}{b}, \frac{c}{d}\right)$ on the circle with radius 1 centred at $(0,0)$ where $a$ and $b$ are relatively prime integers, $c$ and $d$ are relatively prime integers (that is $\operatorname{HCF}(a, b)=\operatorname{HCF}(c, d)=1)$, and the integers $b$ and $d$ are even. Then, the set $S$
→
The probabilities that a student passes in Mathematics, Physics and Chemistry are $m, p$ and $c$ respectively. On these subjects, the student has a $75\%$ chance of passing in at least one, a $50\%$ chance of passing in at least two and a $40\%$ chance of passing in exactly two. Which of the following relations are true
→
If $ax^2 + bx + c = 0$ has real and distinct roots, $\alpha$ and $\beta (\beta > \alpha)$. Further $a > 0, b < 0$ and $c < 0$ then :-
→
If $m$ arithmetic means $( A . Ms )$ and three geometric means $(G.Ms)$ are inserted between $3$ and $243$ such that $4^{\text {th }}$ $A.M.$ is equal to $2^{\text {nd }}$ $G.M.$, then $m$ is equal to
→
If $p \rightarrow (p ∧ \sim q)$ is false, then the truth values of $p$ and $q$ are respectively\sim .
→
In a series of $3n$ observations, if $n$ observations are equal $a$ and remaining observations are equal $-2a$, then the mean deviation of observations about their mean will be:-
→
Equation of the straight line making equal intercepts on the axes and passing through the point $(2, 4)$ is:
→