Answer:
- 
Step-by-step explanation:
Given 630 < A > 720 then A is in the fourth quadrant where
cosA > 0 and sinA < 0
Given
cosA =
= 
Then the triangle is a 3- 4 - 5 with opposite side 4, thus
sinA = -
= - 
Using the trigonometric identity
sin2A = 2sinAcosA
= 2 × -
× 
=
= - 
So the formula you need for this is
A=1/2bh
So count the squares on the outside of the bottom of the triangle and the left so that would be 7 and 7 so you multiply those together to get 49 then you would divide that answer by 2 and get 24.5 so your answer is 24.5 :)
Answer:
Sin 3A = 1
cos 3A = 0
tan 3 A = undefined
Step-by-step explanation:

Answer:
The answer is B
Step-by-step explanation:
A) is a negative answer
C) Is a rational answer
D) is a whole number
Answer:
h (1,2), w (3,4), y (6,0)
Step-by-step explanation:
Reflecting across y-axis means only changing the x -value between negative and positive. Flipping the sign