Answer: b
Step-by-step explanation: I took the test
Answer:
no solution
Step-by-step explanation:
Answer:
cos(2x) = 1 - 2sin²(x)
cos(2x) = 2cos²(x) - 1
1/cos(x) = sec(x)
1) (1-cos(2x))/cos(x) = 2sec(x)sin²(x)
Starting from LHS
(1- (1 - 2sin²(x))/cos(x)
2sin²(x)/cos(x)
2sec(x)sin²(x) = RHS
2) 1/sec²(x) = 1 + cos(2x) - cos²(x)
Starting form RHS
1 + 2cos²(x) - 1 - cos²x
cos²x
(1/sec(x))²
1/sec²(x) = LHS
Answer = V (2,1)
Because:
The equation of the circle is
(x+1)² + (y+3)² = 25
(2+1)² + (1+3)² = 25
3² + 4² = 25
9 + 16 = 25
25 = 25
Answer:
D
Step-by-step explanation:
