answer the 4 th question pls sis (or )bro
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w = FScos@
vectorF.vectorS = (3i +4j - 5k )(5i + 4j +3k)= 15 +16-15 = 16
|vector F|= sqrt (9 + 16 + 25) = sqrt50
|vectorS| = sqrt (25+16+9)=sqrt50
cos@ = W/FS= 16/50 = 8/25
@ = cos^-18/25
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