Question

Sin square 18 + sin square 72+ sin square 108+sin square 162

Answer 1

Answer:

2

Step-by-step explanation:

Sin square 18 + sin square 72+ sin square 108+sin square 162

= sin² 18  +   sin² 72 +  sin² 108  +  sin² 162

= sin² 18  +   sin² 72 +  sin² 72  +  sin² 18

= 2 (    sin² 18  +   sin² 72 )

= 2 (    sin² 18  +   cos² 72 )

= 2