Question

Help me guys...Good Afternoon​

Answer 1

HOPE THIS HELPS YOU :

Tan 4θ . Tan 6θ = 1

Sin 4θ / Cos 4θ . Sin 6θ / Cos 6θ = 1

sin4θsin6θ = cos4θcos6θ

cos4θcos6θ - sin4θsin6θ = 0

cos (4θ+ 6θ) = 0

cos (10θ) = 0

But, cos π / 2 = 0

10θ = π / 2

θ = π / 20 = 200 / 20 = 10°

θ = 10°