Question 53

If tan 2A = cot(A-$$18^\circ$$) and 2A is an acute angle, then find 'A'.

Solution

tan 2A = cot(A-$$18^\circ$$)

$$\Rightarrow \cot\left(90\ -2A\right)$$ = cot(A-$$18^\circ$$)

$$\Rightarrow90$$ - 2A = A - 18

$$\Rightarrow$$A = 36


Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

cracku

Boost your Prep!

Download App