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If `sin(theta) = -(4sqrt(2))/9` and `theta` is in the 4th quadrant, find the exact value of `cos(theta)`
`cos(theta)` =
`cos(theta)` =
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Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Decimal values are not allowed
Trig functions (sin,cos,etc.) are not allowed
`7/9`