Praveen

 2 mark

| -0.25 mark |

 10 minutes

Question 1:

If \( \sin (20+x)^{\circ}=\cos 60^{\circ},\;0^{\circ} \le (20+x)^{\circ} \le 90^{\circ} \), then find the value of \( 2 \sin^{2}(3x+15)^{\circ}-\cosec^{2}(2x+10)^{\circ} \).

Question 2:

If \( \sin 3A = \cos(A+10)^{\circ} \), where \(3A\) is an acute angle then what is the value of \(2\,\mathrm{cosec}\tfrac{3A}{2} + 6\tan^2 3A - \tfrac{3}{2}\tan^2 3A\)?

Question 3:

If \( \cos (2 \theta+54)^{\circ}=\sin \theta, 0^{\circ}<(2 \theta+54)^{\circ}<90^{\circ} \), then what is the value of \( \frac{1}{\cot 5 \theta+\sec \frac{5 \theta}{2}} \)?

Question 4:

If \( \cos \theta = \sin(2\theta) \neq 0 \), what is the value of \( \cos^{4}\theta + \sin^{4}\theta + \cos^{3}\theta + \sin^{3}\theta + \sin^{2}\theta + \cos^{2}\theta + \sin\theta + \cos\theta \)?

Question 5:

Simplify the given expression.

दिए गए व्यंजक को सरल कीजिए।

\(\frac{\sin^{2}32^{\circ}+\sin^{2}58^{\circ}}{\cos^{2}32^{\circ}+\cos^{2}58^{\circ}}+\sin^{2}53^{\circ}+\cos 53^{\circ}\sin 37^{\circ}\)

Question 6:

The value of \(\sin^{2}15^{\circ}+\sin^{2}25^{\circ}+\sin^{2}35^{\circ}+\sin^{2}45^{\circ}+\sin^{2}55^{\circ}+\sin^{2}65^{\circ}+\sin^{2}75^{\circ}\) is:

Question 7:

If \( \sin (5x-25)^\circ = \cos (5y+25)^\circ \), where \(5x-25^\circ\) and \(5y+25^\circ\) are acute angles, then the value of \(x+y\) is:

Question 8:

If \( \sec (5 \alpha-15)^{\circ}=\operatorname{cosec}(15-2 \alpha)^{\circ} \), then the value of \( \cos \alpha+\sin 2 \alpha+\tan (1.5 \alpha) \) is:

Question 9:

The value of \( \frac{5 \cos^{2} 62^{\circ}+5 \cos^{2} 28^{\circ}-21}{7 \sin^{2} 35^{\circ}+7 \sin^{2} 55^{\circ}+1} \) is:

Question 10:

If \( \tan 2 \theta=\cot (\theta-36)^{\circ} \), where \( 2 \theta \) is an acute angle, then the value of \( \theta \) is: ??

Question 11:

The value of \( \frac{4\tan^2 30^\circ + \sin^2 30^\circ \cos^2 45^\circ + \sec^2 48^\circ - \cot^2 42^\circ}{\cos 37^\circ \sin 53^\circ + \sin 37^\circ \cos 53^\circ + \tan 18^\circ \tan 72^\circ} \) का मान ज्ञात कीजिए।

Question 12:

If \( \tan (5 \theta - 10)^{\circ} = \cot (5 \varphi + 20)^{\circ} \), then the value of \( \theta + \varphi \) is:

Question 13:

The value of \((\sin 37^{\circ} \cos 53^{\circ}+\cos 37^{\circ} \sin 53^{\circ}) - \frac{4 \cos^{2} 37^{\circ}-7+4 \cos^{2} 53^{\circ}}{\tan^{2} 47^{\circ}+4-\cosec^{2} 43^{\circ}}\) is:

Question 14:

Find the value of the following.
\(
\frac{\sin 67^{\circ} \cos 37^{\circ}-\sin 37^{\circ} \cos 67^{\circ}}{\cos 13^{\circ} \cos 17^{\circ}-\sin 13^{\circ} \sin 17^{\circ}}
\)

Question 15:

The value of \(\frac{2 \sin^{2}38^{\circ}\sec^{2}52^{\circ}+\cos64^{\circ}\sin26^{\circ}+\sin^{2}64^{\circ}}{\tan^{2}23^{\circ}+\cot^{2}23^{\circ}-\sec^{2}67^{\circ}-\csc^{2}67^{\circ}}\) is:

Question 16:

The value of \(\frac{3(\cosec^{2}26^{\circ}-\tan^{2}64^{\circ})+(\cot^{2}42^{\circ}-\sec^{2}48^{\circ})}{\cot(22-\varnothing)^{\circ}-\cosec^{2}(62+\varnothing)^{\circ}-\tan(\varnothing+68)^{\circ}+\tan^{2}(28-\varnothing)^{\circ}}\) का मान ज्ञात कीजिए।

Question 17:

Find the value of \( \frac{\sqrt{2} \tan (60-\theta)^{\circ} \tan (30+\theta)^{\circ}}{\sin^{2}(45+\theta)^{\circ} + \sin^{2}(45-\theta)^{\circ}} \).

Question 18:

The value of \( \frac{(\cos 9^{\circ}+\sin 81^{\circ})(\sec 9^{\circ}+\operatorname{cosec} 81^{\circ})}{\operatorname{cosec}^{2} 71^{\circ}+\cos^{2} 15^{\circ}-\tan^{2} 19^{\circ}+\cos^{2} 75^{\circ}} \) is:

Question 19:

If \( x=\sec 57^{\circ} \), then \( \cot^{2} 33^{\circ}+\sin^{2} 57^{\circ}+\sin^{2} 33^{\circ}+\operatorname{cosec}^{2} 57^{\circ} \cos^{2} 33^{\circ}+\sec^{2} 33^{\circ} \cdot \sin^{2} 57^{\circ} \) is equal to :

Question 20:

The value of \( \frac{\sin^{2}52^{\circ} + 2 + \sin^{2}38^{\circ}}{4\cos^{2}43^{\circ} - 5 + 4\cos^{2}47^{\circ}} \) is:

Question 21:

The value of \( \frac{5 \cos ^{2} 62^{\circ}+5 \cos ^{2} 28^{\circ}-21}{7 \sin ^{2} 35^{\circ}+7 \sin ^{2} 55^{\circ}+1} \) is:

Question 22:

The value of \(\begin{array}{c}\frac{3\bigl(\cot^{2}47^{\circ}-\sec^{2}43^{\circ}\bigr)-2\bigl(\tan^{2}23^{\circ}-\cosec^{2}67^{\circ}\bigr)}{\cosec^{2}(68+\theta)^{\circ}-\tan(\theta+61)^{\circ}-\tan^{2}(22-\theta)^{\circ}+\cot(29-\theta)^{\circ}}\\\frac{3\bigl(\cot^{2}47^{\circ}-\sec^{2}43^{\circ}\bigr)-2\bigl(\tan^{2}23^{\circ}-\cosec^{2}67^{\circ}\bigr)}{\cosec^{2}(68+\theta)^{\circ}-\tan(\theta+61)^{\circ}-\tan^{2}(22-\theta)^{\circ}+\cot(29-\theta)^{\circ}}\end{array}\) का मान ज्ञात कीजिए।

Question 23:

The value of/का मान बताइए।
\[
\frac{\sin 23^{\circ} \cos 67^{\circ} + \sec 52^{\circ} \sin 38^{\circ} + \cos 23^{\circ} \sin 67^{\circ} + \cosec 52^{\circ} \cos 38^{\circ}}{\cosec^{2}20^{\circ} - \tan^{2}70^{\circ}}
\]