Question

In DEF, sin D= 36/39. What is cos E?

Answer 1

36/39

Explanation:

Answer 2

The correct option is C.

Explanation:

Given information: In DEF, sin D= 36/39.

In a right angled triangle,

`\sin \theta=(perpendicular)/(hypotenuse)`

`\sin D=(EF)/(DE)`

`(36)/(39)=(EF)/(39)`

`EF=36`

`\cos \theta=(base)/(hypotenuse)`

`\cos E=(EF)/(DE)`

`\cos E=(36)/(39)`

The value of cos E is
`(36)/(39)`. Therefore the correct option is C.