Here,a(n) = a + (n-1)d
Here, a = 5, d = 12-5 = 8, a(n) = 181
Substitute this values in to the expression,
181 = 5 + (n-1)8
181-5 = 8n-8
176+8 = 8n
n = 184/8
n = 23
So, it is 23th term of that Arithmetic Progression.
Hope this helps!
The exact value of arcsin ( 2 √ 2 ) is π4.
X1= -60, X2= 60 hope its right
Use the Pythagorean theorem /look at the picture/
? = x
Equal to, I think. Hope this helps.... If not sorry.