Question

Help plzzzzzzzzzzzzzzzzz

Answer 1

0.9

Explanation:

Basic angle =

`cos { }^( - 1) ( (4)/(5) ) = 36.870 \: degrees \\`

Therefore,

`theta = 180 + 36.870 = 216.87 \: degrees`

Therefore,

`\sin( (theta)/(2) ) = \sin(108.435 ) = 0.9`

Answer 2

this answer is -1.8

Explanation:

because you add and subtract all of them