If sec4θ = cosec(θ + 20°), then θ is equal to:
A. 22°
B. 18°
C. 14°
D. 20°
Answer: Option C
Solution(By Examveda Team)
sec4θ = cosec(θ + 20°)sec4θ = sec[90° - (θ + 20°)]
sec4θ = sec(70° - θ)
4θ = 70° - θ
5θ = 70°
θ = 14°
This Question Belongs to Arithmetic Ability >> Trigonometry
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