√70 is because . Choose the best response to fill in the blanks above.

A
Irrational ; because it's perfect square

B
Irrational ; because it's a non-perfect square

C
Rational; because it's a perfect square

D
Rational ; because it's a non-perfect square

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation:

answer: 75°

step-by-step explanation:

∠esk is the supplement of ∠edk, so is 100°. ∠esd = 1/2·arc ed, so is 25°.

since ∠esk = ∠esd + ∠dsk

you have 100° = 25° + ∠dsk . .

fill in known values 75° = ∠dsk . . . . .

subtract 25°

step-by-step explanation:

mr. india