• A. $\sin \theta \cos \theta =\frac{1}{2}\sin 2\theta$
• B. $\sin \theta +\cos \theta =1$
• C. $\sin \left(-\theta \right)=\sin \theta$
• D. $\tan \theta =\frac{\cos \theta }{\sin \theta }$

Answer: Option A

Explanation:

• A. $8$
• B. $16$
• C. $256$
• D. $100$

Answer: Option B

Explanation:

• A. $2\sqrt{5}$
• B. $16\sqrt{5}$
• C. $9\sqrt{5}$
• D. $5\sqrt{2}$

Answer: Option A

Explanation:

• A. $6$
• B. $5$
• C. $4$
• D. $3$

Answer: Option B

Explanation:

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer: Option D

Explanation:

• A. $10$
• B. $\frac{1}{10}$
• C. $\frac{1}{100}$
• D. $100$

Answer: Option C

Explanation:

• A. $a^2+\frac{1}{a^2}$
• B. $\frac{1}{2}(a^2+\frac{1}{a^2})$
• C. $\frac{1}{4}(a^2+\frac{1}{a^2})$
• D. $2(a^2+\frac{1}{a^2})$

Answer: Option B

Explanation:

• A. $\frac{1}{2}$
• B. $2$
• C. $\frac{1}{\sqrt{2}}$
• D. $\frac{1}{\sqrt{3}}$

Answer: Option A

Explanation:

• A. $-\frac{4}{5}$
• B. $\frac{4}{5}$
• C. $-\frac{3}{5}$
• D. $\frac{3}{5}$

Answer: Option A

Explanation:

• A. $3$
• B. $4$
• C. $5$
• D. $6$

Answer: Option A

Explanation:

• A. $.০৫$
• B. $.৫$
• C. $.০০৫$
• D. $.০২$

Answer: Option B

Explanation:

• A. $0$
• B. $-1$
• C. $1$
• D. $-\infty$

Answer: Option B

Explanation:

• A. $x=6$
• B. $x<6$
• C. $x\ge 6$
• D. $x>6$

Answer: Option C

Explanation:

• A. $3$
• B. $\frac{1}{2}$
• C. $6$
• D. $9$

Answer: Option B

Explanation:

• A. $2$
• B. $4$
• C. $24$
• D. $22$

Answer: Option B

Explanation: