Question should be sin 20 cos 10 + cos 20 sin 10
remember sin (a+b) = sin a cos b + cos a sin b ?
sin 20 cos 10 + cos 20 sin 10
= sin (20+10)
= sin 30
= 1/2
108 for one interior angle is my answer. not sure if it's right tho
7 x 1 =1/2 of another number heres the answe
Answer:
1. -15x + 60 <= 105 2. 14x + 11 <= - 31
Step-by-step explanation:
1. x> = - 3
2. x <= - 3
Isolate the variable by dividing each side by factors that don't contain the variable
4n/4n-4 × n-1/n+1
= 4n(n-1)/(4n-4)(n+1)
= (4n^2 - 4n)/(4n^2 + 4n - 4n-4)
= (4n^2 - 4n)/(4n^2 - 4)
= 4(n^2 - n)/4(n^2 - 1)
=(n^2 - n)/(n^2 - 1)
