Question

Is this 3/4? Need help pls

Answer 1

sinE =
`(3)/(5)`

Explanation:

To find sinE we require DF

Using Pythagoras' identity in the right triangle

DF² = EF² - DE² = 10² - 8² = 100 - 64 = 36 ( take square root of both sides )

DF =
`√(36)` = 6

Then

sinE =
`(opposite)/(hypotenuse)` =
`(DF)/(EF)` =
`(6)/(10)` =
`(3)/(5)`