Decide whether the equation is or is not an identity.sin (? + ?) + sin (? - ?) = 2 sin ? cos ?
A. Identity
B. Not an identity
Answer: A
Mathematics
You might also like to view...
Graph the ellipse and locate the foci.
+ 
= 1 
A. foci at (0, 2
) and (0, -2
)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (3
, 0) and (-3
, 0)
D. foci at (0, 3
) and (0, -3
)
Mathematics
Factor. Check by multiplying.7 + 70a + 63b
A. 7(0 + 10a + 9b) B. 70(1 + a + b) C. 7(1 + 70a + 63b) D. 7(1 + 10a + 9b)
Mathematics
Multiply.-3x2(-8x4 - 10x3 - 11)
A. 24x6 + 30x5 B. 24x6 + 30x5 + 33x2 C. 24x6 - 10x3 - 11 D. 24x4 + 30x3 + 33
Mathematics
Choose the correct right-hand side to make the equation an identity.
A) sec(x)
B) csc(x)
C) 1
D) sin²(x) + 1
Mathematics