Sec^2 x - 1 = tan^2x
Proof:
Sec^2x = 1+ tan^2x
1/cos^2x = 1 + sin^2x/cos^2x
<span>1/cos^2x - sin^2x/cos^2x = 1
</span>Using common denominator:
(1-sin^2x)/cos^2x = 1
sin^2x + cos^2 x = 1
cos^2 x = 1 - sin^2x
Substituting :
cos^2x/<span>cos^2x = 1
</span>1 = 1
Left hand side = right hand side
Answer:
37.5
Step-by-step explanation:
3 ÷ 8 = 0.375
0.375 × 100 = 37.5
105 times 15= 1575
57 times 20= 1140
1140+1575= 2715
(2715)(d)= x
x being the total amount the company paid
I = prt
r = i / pt
r = 36 / 200*3
r = 36 / 600
r = 0.06
answer
a. 0.06
First your going to add 40+20%=48
so 48 is the original pice
