AP EAMCET · Maths · Trigonometric Ratios & Identities
If \(\sec (\theta+\alpha), \sec \theta\) and \(\sec (\theta-\alpha)\) are arithmetic progression, then \(\sin ^2 \theta=\)
- A \(\cos \alpha\)
- B \(2 \cos \alpha\)
- C \(-2 \cos \alpha\)
- D \(-\cos \alpha\)
Answer & Solution
Correct Answer
(D) \(-\cos \alpha\)
Step-by-step Solution
Detailed explanation
Since \(\sec (\theta+\alpha), \sec \theta, \sec (\theta-\alpha)\) are in A.P.…
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