Question

7. sin4 0 + 2 sin? 0 cos2 0 + cos+ 0 = 1.

Answer 1

sin4 0 + sin2 0 =1

Step-by-step explanation:

cos2 0 + cos 0 = 1

cos 0 = 1 - cos2 0 [ sin2 0 + cos2 0 =1

sin2 0 = 1 - cos2 0]

cos 0 = sin2 0

sin4 0 + sin 2 0 = (sin2 0)2 + sin2 0 =

= cos2 0 + cos 0 = 1

= ( sin2 0= cos0)