Answer:
sin(3π/7 - 2π/21)
Step-by-step explanation:
Given
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21
Required
Write a trigonometry formula for the expression
Using sine formula, we have:
sin(A - B) = sinAcosB - cosAsinB
The above formula can be applied to the given expression where
A = 3π/7
B = 2π/21
So, the trigonometry formula is:
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21= sin(3π/7 - 2π/21)
Answer:
x>1
Step-by-step explanation:
12x+2>14
12x>12
x>1
Answer:
they are congruent because SAS
Step-by-step explanation:
Hello!
x+2y=10
x=10-2y
6y=-3(10-2y)+30
6y=-30+6y+30
0=0
Hope this Helps! :)
It is 40 1/2 because it's a mixed number<span />