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OpenStudy (anonymous):
The picture shows a barn door: what is the length of the support AB? cos45/7 7 tan 45 7/sin45 7/cos45
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OpenStudy (anonymous):
OpenStudy (p0sitr0n):
sin45=7/AB => AB = 7/sin45 thus c)
OpenStudy (anonymous):
you're a life saver thanks
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