Question

If 4 cos~theta- 3=0 then sin theta=?

Answer 1

Answer:

Step-by-step explanation:

4 cos Ф-3=0

4 cosФ=3

cosФ=3÷4

Now

     as we know that cos Ф=b÷h

b÷h=3÷4

So

    base=3 and hypotenus=4

  Now we have to calculate the perpendicular as the formula of sinФis p÷h

 So

      p²=h²-b²

      p²=4²-3²

      p²=16-9

      p²=7

      p=√7

we have perpendicular(p)=√7

 Again

         sinФ=perpendicular/hypotenus

        sinФ=√7/4