Solve the linear system x = 3(mod 4), x = 5(mod 9)
O a. x=23+36t
O b. x=36-23t
n
O cx=36+23t
O d. x= -23-36t
Answers
Answered by
0
Answer:
Step-by-step explanation:
We can derive the product-to-sum formula from the sum and difference identities for cosine. If we add the two equations, we get:
cos
α
cos
β
+
sin
α
sin
β
=
cos
(
α
−
β
)
+
cos
α
cos
β
−
sin
α
sin
β
=
cos
(
α
+
β
)
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
2
cos
α
cos
β
=
cos
(
α
−
β
)
+
cos
(
α
+
β
)
Then, we divide by \displaystyle 22 to isolate the product of cosines:
cos
α
cos
β
=
1
2
[
cos
(
α
−
β
)
+
cos
(
α
+
β
)
]
Similar questions