Question

find the valu of thitha:(thitha<thitha<90°) sin5thitha=cos 2thitha​

Answer 1

Answer:

θ = $\frac{\pi}{14}$ = 12.85°

Step - by - step explanation :

=> Sin 5θ =  cos 2θ

=> sin 5θ = sin (π/2 - 2θ)

=> 5θ = π/2 - 2θ

=> 5θ + 2θ = π/2

=> 7θ = π/2

=> θ = $\frac{\pi}{14}$

=> θ = 12.85°