# precal- PLEASE HELP!

posted by
**olivia**
.

Given:cosA= 4/5 0(less than or equal to)A(less than of equal to)90*

find sinA, sin2A, cos2A

posted by
**olivia**
.

Given:cosA= 4/5 0(less than or equal to)A(less than of equal to)90*

find sinA, sin2A, cos2A