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( sin 150 +5 cos 300 + 7 tan 225)/(tan 1...

` ( sin 150 +5 cos 300 + 7 tan 225)/(tan 135 + 3 sin 210) `

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`(sin150^@+5cos300^@+7tan225^@)/(tan135^@+3sin210^@)`
`= (sin(180-30)^@+5cos(360-60)^@+7tan(180+45)^@)/(tan(180-45)^@+3sin(180+30)^@)`
`= (sin(30)^@+5cos(60)^@+7tan(45)^@)/(-tan(45)^@+(-3sin(30)^@))`
`=(1/2+5/2+7)/(-1-3/2) `
`= (20/2)/(-5/2)`
`= -4`
`:. (sin150^@+5cos300^@+7tan225^@)/(tan135^@+3sin210^@) = -4`
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