MCQ
The value of $\cos ^{-1}(-1)$ is
- A$0$
- B1
- ✓$\pi$
- D$-\pi$
✓
Answer
Correct option: C.
$\pi$
(C)
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The eqution of the plane which cute equal intercepts of unit length on the coordinate axes is:
The value of $\int_0^1 \frac{x^4+1}{x^2+1} d x$ is
→If a r.v. $X$ has p.d.f., $\mathrm{f}(x)=\frac{1}{x \log 3}$, for $1<x<3$, then $\mathrm{E}(\mathrm{X})$ and Var (X) are respectively ____________ .
→The angle between the pair of straight lines $3 x^2+10 x y+8 y^2=0$ is $\tan ^{-1}(p)$, where $p=$
→Equation of a line passing through point $(1,2,-4)$ and perpendicular to lines $\frac{x-8}{3}=\frac{y+19}{-16}=\frac{z-10}{7}$ and $\frac{x-15}{3}=\frac{y-29}{8}=\frac{z-5}{-5}$ is
→$\int_0^1 x(1-x)^n d x=$
→→
Which of the following expression are meaningful?
$\lim\limits_{\text{n}\rightarrow\infty}\Big\{\frac{1}{2\text{n}+1}+\frac{1}{2\text{n}+2}+\ .....+\frac{1}{2\text{n}+\text{n}}\Big\}$ is equal to:
→If $A=\left[\begin{array}{cc}2 & -1 \\ -1 & 2\end{array}\right]$ such that $A^2-4 A+3 I=0$ where $I$ is a unit matrix of order, 2 , then $A^{-1}$ is
→