Look kid, this question has been up for 17 hours think its time to let it go......... hoped i helped. ✔verified✔
Answer:
Identity (a) can be re-written as

which we already proven in another question, while for idenity (b)

step A is simply expressing each function in terms of sine and cosine.
step B is adding the terms on the LHS while multiplying the one on RHS.
step C is replacing the term on the numerator with the equivalent from the pithagorean identity 
Answer:

Step-by-step explanation:
This inequality is quite simple to solve.
Just multiply both sides by four and you have your answer:


Hope this helps!
Answer:
Top right is QI, top left is QII, bottom left is QIII, bottom right is QIV
Step-by-step explanation:
the quadrants start with one at the top left and rotate counterclockwise, rotate to the left
Answer/Step-by-step explanation:
3:2 = 6:4 = 15:10
<u>Check work:</u>
3 ÷ 2 = 1.5
6 ÷ 4 = 1.5
15 ÷ 10 = 1.5