If $\sin 2θ = \cos 40°$, then the smallest positive value of θ is:
Answer & explanation
Correct answer: option 1
We have,
$\sin 2θ = \cos 40°$
If sinx = cosy then the value of x + y = 90o
2θ + 40° = 90°
2θ = 90° - 40° = 50°
θ = 25°
If $\sin 2θ = \cos 40°$, then the smallest positive value of θ is:
Correct answer: option 1
We have,
$\sin 2θ = \cos 40°$
If sinx = cosy then the value of x + y = 90o
2θ + 40° = 90°
2θ = 90° - 40° = 50°
θ = 25°