the answer is "Using the trigonometric identity
sin²x + cos²x = 1 , then sin²x = 1 - cos²x
Consider the left side
sin²a - sin²b
= (1 - cos²a) - (1 - cos²b)
= 1 - cos²a - 1 + cos²b
= cos²b - cos²a
= right side , thus verified"
Answer:
10*10*10*10*10*10*10*10*10*10*10*10*10=10000000000000
4.94*10000000000000=49400000000000
49400000000000-26000000000= 49374000000000
Step-by-step explanation:
7 * 8 - 4d = 8
56 - 8 = 4d
48 = 4d
d = 48 : 4 =
12
--------------------------
7 * 8 - 4 * 12 = 8
Answer:
∠ BCD = 44°
Step-by-step explanation:
the secant- tangent angle BCD is half the difference of the intercepted arcs, so
∠ BCD = 
(EB - BD) = (171 - 83)° = × 88° = 44°
