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What is the exact value? Given sin = 1/2 with /2 < < , and cos= -1/4 with < < 3/2, Find sin and tan

What is the exact value?

Given sin = 1/2 with /2 < < , and cos= -1/4 with < < 3/2, Find sin and tan

Find cos( - )

Find tan(2)

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