Trigonometric-Equations Question 394
Question: If $ \cos 40^{o}=x $ and $ \cos \theta =1-2x^{2} $ , then the possible values of $ \theta $ lying between $ 0^{o} $ and $ 360^{o} $ is
Options:
A) $ 100^{o} $ and $ 260^{o} $
B) $ 80^{o} $ and $ 280^{o} $
C) $ 280^{o} $ and $ 110^{o} $
D) $ 110^{o} $ and $ 260^{o} $
Correct Answer: A
Show Answer
Answer:
Solution:
BETA
