1.

What is the value of(sin34^(@)cos236^(@)-sin56^(@)sin124^(@))/(cos28^(@)cos88^(@)+cos178^(@)sin208^(@))?

Answer»

`-2`
`-1`
2
1

Solution :`(sin34^(@)cos236^(@)-sin56^(@)sin124^@)/(cos28^(@)cos88^(@)+cos178^(@)sin208^(@))`
`=(sin34^(@)(-cos56^(@))-sin56^(@)cos34^(@))/(cos28^(@)SIN2^(@)+COS2^(@)sin28^(@))`
`(-sin34^(@)cos56^(@)-sin56^(@)cos34^(@))/(SIN(28^(@)+2))`
`=-(sin(34^(@)+56^(@)))/(sin30^(@))=(-SIN90^(@))/(sin30^(@))=(-1)/(1/(2))=-2`


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