1+cos2a+sin2a/1-cos2a+sin2a=cota

Proved

Step-by-step explanation:

Required

Show that:

So, we have:

So, we have:

Rearrange the numerator

So, we have

So, we have:

Factorize:

Rewrite as:

tangent

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of