Question

Question #b9d80

Answer 1

`sin 495°=1/(√2)`

`=>sin(90xx5+45)°=1/(√2)`

`=>cos45=1/sqrt2`

`sin375=sin(90xx4+15)=sin15`

`=sin(60-45)=sin60cos45-cos60sin45`

`=sqrt3/2xx1/sqrt2-1/2xx1/sqrt2`

`=(sqrt3-1)/(2sqrt2)`