Q. if `x=sin 130^@ cos 80^@`, `y=sin80^@ cos130^@=1+xy` ,which one of the following is true

If x = sin 130^(@) cos 80^(@), y = sin 80^(@) cos 130^(@), z = 1+xy , which one of the following is true ?

If x = sin 130^(@) cos 80^(@), y = sin 80^(@) cos 130^(@), z = 1+xy , which one of the following is true ?

If x = sin 130^(@) cos 80^(@), y = sin 80^(@) cos 130^(@), z = 1+xy , which one of the following is true ?

For y= cos(m sin^(-1)x) , which of the following is true?

For y= cos(m sin^(-1)x) , which of the following is true?

If x=sin t and y=cos p t , then which of the following is true ?

If x=sin 130^(@) + cos 130^(@) then

If x cos theta + y sin theta =2 and x cos theta - y sin theta =0 , then which one of the following is true ?

Show that |(sin10^@ , - cos10^@),(sin80^@, cos80^@)| = 1

If sin x+sin y=a o* cos x+cos y=b then which of the following may be true