Cos (x°) = sin (90 - x°) using complete sentences, explain why an infinite number of x values that will prove the trigonometric identity to be true.

Step-by-step explanation:

Consider the trigonometric identity:

Cos (x°) = Sin (90° - x°)

Trigonometric identity:

Sin (A - B) = Sin (A) Cos (B) - Cos (A) Sin (B)

Now, use trigonometric identity:

Cos (x°) = Sin (90° - x°) for any value of x.

Cos (x°) = Sin (90°) Cos (x°) - Cos(90°) Sin (x°)

Since, the value of sin (90°) = 1 and cos (90°) = 0.

Therefore,

Cos (x°) = 1 × Cos (x°) - 0 × Sin (x°)

Cos (x°) = Cos (x°) for any value of x.

Hence proved.

you have 6 cupcakes

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies