Question

If sin tita + sin square tita = 1, then prove that cos square tita + cos four tita = 1

​

Answer 1

Answer:

Step-by-step explanation:

Sin tita + sin square tita = 1

Sin tita = 1 - sin square tita

Sin tita = cos square tita ( sin square tita + cos square tita = 1) ( equation 1 )

Squaring on both sides

Sin square tita = cos four tita ( equation 2 )

From 1 and 2 we will get

Sin tita + sin square tita = 1

Cos square tita + cos four tita = 1