Short Quiz

Question 1 of 5

NCERT Exemplar

The value of

$$ \sin 20^{\circ} \sin 40^{\circ} \sin 60^{\circ} \sin 80^{\circ} $$

is

A $-\frac{3}{16}$ B $\frac{5}{16}$ C $\frac{3}{16}$ D $\frac{1}{16}$

Select an option to see the answer, or skip this question.

Question 2 of 5

NCERT Exemplar

If $\alpha+\beta=\frac{\pi}{4}$, then the value of $(1+\tan \alpha)(1+\tan \beta)$ is

A 1 B 2 C -2 D Not defined

Select an option to see the answer, or skip this question.

Question 3 of 5

NCERT Exemplar

Which of the following is not correct?

A $\sin \theta=-\frac{1}{5}$ B $\cos \theta=1$ C $\sec \theta=\frac{1}{2}$ D $\tan \theta=20$

Select an option to see the answer, or skip this question.

Question 4 of 5

NCERT Exemplar

The value of $\cot \left(\frac{\pi}{4}+\theta\right) \cot \left(\frac{\pi}{4}-\theta\right)$ is

A -1 B 0 C 1 D Not defined

Select an option to see the answer, or skip this question.

Question 5 of 5

NCERT Exemplar

Number of solutions of the equation $\tan x+\sec x=2 \cos x$ lying in the interval $[0,2 \pi]$ is

A 0 B 1 C 2 D 3

Select an option to see the answer, or skip this question.

Class 6