MCQ
$9 \sec ^2 A-9 \tan ^2 A$ is equal to
- A1
- ✓9
- C8
- D$0$
✓
Answer
Correct option: B.
9
B
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
Choose the correct answer from the given four options:
In two line segments AC and BD intersect each other at the point P such that PA = 6cm, PB = 3cm, PC = 2.5cm, PD = 5cm, $\angle\text{APB}=50^\circ\text{ and} \ \angle\text{CDP}=30^\circ.$ Then $\angle\text{PBA}$ is equal to:
→In two line segments AC and BD intersect each other at the point P such that PA = 6cm, PB = 3cm, PC = 2.5cm, PD = 5cm, $\angle\text{APB}=50^\circ\text{ and} \ \angle\text{CDP}=30^\circ.$ Then $\angle\text{PBA}$ is equal to:
$\triangle PQR \sim \triangle XYZ$ and the perimeters of $\triangle PQR$ and $\triangle XYZ$ are 30 cm and 18 cm respectively. If $QR =9 cm$, then, YZ is equal to
→For the following distribution:
the modal class is
| Below: | 10 | 20 | 30 | 40 | 50 | 60 |
| Number of students: | 3 | 12 | 27 | 57 | 75 | 80 |
If probability of success is $0.9 \%$, then probability of failure is
→In the given figure, quadrilateral $\text{ABCD}$ is circumscribed, touching the circle at $\text{P, Q, R}$ and S . If $AP =5 \ cm, BC =7 \ cm$ and $CS =3 \ cm$. Then, the length $AB =$ ?
→If $P(2,4), Q(0,3), R(3,6)$ and $S(5, y)$ are the vertices of a parallelogram $P Q R S$, then the value of $y$ is
→If the sum of the areas of two circles with radii $r_1$ and $r_2$ is equal to the area of a circle of radius $r,$ then $\text{r}^2_{1}+\text{r}^2_{1}$
→If $m^{\text {th }}$ term of an A.P. is $1 / n$ and $n^{\text {th }}$ term is $1 / m$, then the sum of first $m n$ terms is
→Choose the correct answer from the given four options : If $7$ times the $7^{th}$ term of an $AP$ is equal to $11$ times its $11^{th}$ term, then its $18^{th}$ term will be :
→If $\alpha$ and $\beta$ are the roots of $a x^2+b x+c=0,$ then the wrong statement is :
→