ok.now tell me answer
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Explanation:
first case
cos 0°= 1
so W= Fs cos Theta
= Fs ×1
W = Fs
second case
cos 90°= 0
so
W = Fs cos theta
W= Fs × 0
W= 0
3rd case
cos 180° = -1
so
W= Fs ×(-1)
W= -Fs
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