Question

if cos² theta =4/5 then sin²theta=​

Answer 1

Answer:

1/5

Step-by-step explanation:

cos² theta + sin²theta  = 1 ( basic trigonometric identity)

from here :

cos² theta =4/5 ( Given )

then sin²theta=​ 1-4/5

sin²theta = 1/5

Answer 2

Answer:

pls refer to the attachment

Hope it helps！！