" If "sin x+sin y=a&cos x+cos y=b," then which of the following may be true."

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

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

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

If sin x+sin y=a and cos x+cos y=b then thevalue of sin(x+y) is

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 sin x + sin y = a, cos x + cos y = b, then what is the value of cos (x-y) ?

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