15) factor out cos: cos(x)(sin(x)+1)=0
Now this is true when either cos(x)=0 (x=pi/2 and 3pi/2)
Or when sin(x)=-1 (x=3pi/2)
So it's solutions are pi/2 and 3pi/2
Since triangle is isosceles, that means that unknown angles are equal. 180-72=108
108:2=54
So you’re answer would be: 54 degrees.
Answer:
75°
Step-by-step explanation:
180°-22°-85°=75°
The measure of the inside angles in a triangle always equals 180 degrees.
Hope this helps! :)
3/4 + 4/5 =
15/20 + 16/20 = 31/20
= 1 and 11/20
