Question

If sec^2 A=5/2
What is 1-sin^2 A?

Answer 1

sec =1/cos so cos=2/5

Answer 2

so cos^2 a=2/5

Answer 3

cos^2 a+ sin^2 a=1

Answer 4

That was fast but didnt understand how you got it...

Answer 5

cos^2a=1-sin^2a

Answer 6

now got it

Answer 7

transposed?

Answer 8

yes

Answer 9

two identities were used here

Answer 10

\[\sin ^2x+\cos^2x=1\]

Answer 11

\[\sec^2=1/\cos^2a\]

Answer 12

now u got it ?

Answer 13

reciprocal and pythagorean identities....yup

Answer 14

hmmmmm........

Answer 15

dont know those identities

Answer 16

?

Answer 17

Do you understand this:\[1-\sin^2 A = \cos^2 A\]

Answer 18

yes pythagorean

Answer 19

so my answer here is just 2/5?

Answer 20

Indeed.

Answer 21

1-sin^2 A= 2/5

Answer 22

?

Answer 23

Indeed