use tan(pi/12)= sqrt(7 - 4sqrt3) in the formula.a.) Prove the identity (1-tan2x) / (1 + tan2x) = cos2x
b.) Hence, prove that tan(pi/12)= sqrt(7 - 4sqrt3)
I have managed to proved the identity but I don't know what to do for part b.
a.) Prove the identity (1-tan2x) / (1 + tan2x) = cos2x
b.) Hence, prove that tan(pi/12)= sqrt(7 - 4sqrt3)
I have managed to proved the identity but I don't know what to do for part b.
Suppose you have
\(\displaystyle \dfrac{1-a}{1+a}\, =\, b\)
What is a in terms of b?
Thank you guys, I know how to solve it now
@Ishuda My understanding is that a cannot be expressed in terms of b. How would you do that?
Multiply "both sides" (of the equation) by (1 + a). What do you get?
Oh, It was simpler than i thought.