Answer:
cos x ≠ 0 ⇔ x ≠ 
; k ∈ N
<=> cos²x + sin²x = 1
⇔ 1 = 1
=> x = { R \ (pi/2 + k.pi); k ∈ N}
Step-by-step explanation:
The answer is no. because is you substitute the value 3 in for x into the equation and solve you get,
4(3)+3=18 which says 12+3=18 15=18 and that is an untrue statement.
Hope this helps explain the concept so you understand! Any questions feel free to ask! Please rate if I helped you! thank you so much!!
Answer:
c
Step-by-step explanation:
Multiplying 49 by 1/7 in the inverse operation of dividing it by 7, so they will both get the correct answer.
Answer:
1. There are 609 more fiction books than non-fiction books in the library
2. Cheryl had $900 initially
