Prove that : \[ \cos 15^{\circ}-\sin 15^{\circ}=\frac{1}{\sqrt{2}} \]

Channel:
PW Solutions
Subscribers:
514,000
Published on ● Video Link: https://www.youtube.com/watch?v=V2WsNuxglHc


Duration: 3:08
5 views
0

Prove that :
\[
\cos 15^{\circ}-\sin 15^{\circ}=\frac{1}{\sqrt{2}}
\]
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-10-26Prove that \[ \frac{\cos 20^{\circ}-\cos 70^{\circ}}{\sin 70^{\circ}-\sin 20^{\circ}}=1 \]
2022-10-26Why did Mahatma Gandhi find in 'salt' a powerful symbol that could unite the nation? Explain.
2022-10-26Explain the reason for the Lahore Session of the Congress in 1929 to be called the historical ses...
2022-10-26Prove that: \[ \frac{\sin x+\sin y}{\cos x+\cos y}=\tan \frac{x+y}{2} \]
2022-10-26Why did Gandhiji launch the Civil Disobedience Movement? Explain any three reasons.
2022-10-26Explain the role of Ambedkar in uplifting the dalits or the depressed classes.
2022-10-26Prove that: \[ \frac{\sin 5 x+\sin 3 x}{\cos 5 x+\cos 3 x}=\tan 4 x \]
2022-10-26Prove that: \[ \frac{\cos 7 x+\cos 5 x}{\sin 7 x-\sin 5 x}=\cot x \]
2022-10-26Explain the effects of 'worldwide economic depression' on India, towards late 1920 s.
2022-10-26What type of flag was designed during the 'Swaraj Movement' in Bengal? Explain its main features....
2022-10-26Prove that : \[ \cos 15^{\circ}-\sin 15^{\circ}=\frac{1}{\sqrt{2}} \]
2022-10-26Prove that: \[ \sin 36^{\circ}+\cos 36^{\circ}=\sqrt{2} \cos 9^{\circ} \]
2022-10-26Prove that : \[ 2 \cos 45^{\circ} \cos 15^{\circ}=\frac{\sqrt{3}+1}{2} \]
2022-10-26Prove that: \[ \sin 80^{\circ}-\cos 70^{\circ}=\cos 50^{\circ} \]
2022-10-26Whoas Alluri Sitaram Raju? Explain his role in inspiring the rebels with Gandhiji's ideas.
2022-10-26Why did Non-Cooperation Movement gradually slow down in cities? Explain two reasons.
2022-10-26Mention three reasons for which the rich peasant communities took active participation in the Civ...
2022-10-26Express each of the following as the product of sines and cosines: \[ \cos 10 x-\cos 6 x \]
2022-10-26Describe the spread of Non-Cooperation Movement in the countryside.
2022-10-26(a) What was the Inland Emigration Act of 1859 ? (b) What was the notion of Swaraj for the planta...
2022-10-26Express each of the following as the product of sines and cosines: \[ \sin 10 x+\sin 6 x \]


Tags:
pw