*plese * *will be awarded brainliest answer*
pes experiments frequently use an x-ray wavelength of 0.8340 nm. recall that the energy of a photon can be calculated using the equation e=hclλ.
a. calculate the energy of the x-ray photon used in the pes experiment described.
b. calculate the ionization energy of a photoelectron with a kinetic energy of 2.372*10^-16j.

Explanation:

Use the trigonometric ratio definition of the tangent function and the quotient rule.

Quotient rule: the derivative of a quotient is:

So,

                                   = [ cos(x)cos(x) + sin(x) sin(x) ] / [ cos(x)]²

                                   = [ cos²(x) + sin²(x) ] / cos²(x)

                                   = 1 / cos² (x)

                                   = sec² (x)

The result is that the derivative of tan(x) is sec² (x)

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