Sin(a + b) = sin a .cos b + cos a . sin b
In an isosceles triangle two angles will be equal
So, if 50 is one of the equal angles then the angles will be (50,50,80)
Otherwise if 50 is the non-equal angle then the angles will be (50,65,65)
I don't know the answer, but I suggest downloading the app: PhotoMath. It scans a math problem and shows you how to complete the problem. I hope this helped~!
The value of 7 in 7,283 is 10 times the value of 7 in 2,783
