1 – cos(x) = 2 – 2 sin^2(x) from (–π, π)
Please show steps!!

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: