We will use double angle identities:
cos (5x ) = sin (10x )
cos (5x ) = 2 cos (5x ) sin ( 5x )
cos ( 5 x) - 2 cos ( 5 x ) sin ( 5x ) = 0
cos ( 5 x ) · [ 1 - 2 sin (5 x) ] = 0
cos ( 5 x ) = 0 or : 1 - 2 sin (5 x) = 0
5 x = π/2 +kπ, k∈Z sin (5 x) = 1/2
x1 = π/10 + kπ/5 5 x = π/6+2kπ , k∈ Z
5 x = 5π/6 +2kπ , k∈ Z
x 2 = π/30 +2kπ/5
x 3 = π/9 + 2kπ/5
Answer:
1.25
Step-by-step explanation:
(1/10) x 12.5
A) $7. 69 change she will get back when she use 50.00 for her pants and sweater
Answer:
Im pretty sure the answer is 410 2/3
I hope this helped to answer your question.
Have a great day! :)
That’s easy. To turn 5/2 into 10/4 you multiply by 2. :D Hope this helps!
