Let
cos x=7/18
x=arc cos (7/18)-----> using a calculator-------> x=67.11°-----> x=1.17 radians
the answer is
x=67.11° or x=1.17 radians
AC=2AE ( because diagonal of rhombus bisect each others)
AE=8 cot 53°
AE=6
AC=2 x 6 = 12
Hence, The length of AC is 12
Answer: Y=-7 X=-9
Step-by-step explanation:
Multiply the diagonals together and then divide by two
4 x 6 / 2
so the answer would be 12yd
<span>"Find the value of the derivative (if it exists) at each indicated extremum. To solve this, apply derivatives in calculus.
f (x) = cos(πx/2)
the first derivative is the change at the indicated extremum
f'(x) = -</span>π/2sin(πx/2)
