AP EAMCET · Maths · Trigonometric Ratios & Identities
\(\sin (x+y) \sec x \sec y=\)
- A \(\cos x \cos y\)
- B \(\tan x-\tan y\)
- C \(\cos x+\cos y\)
- D \(\tan x+\tan y\)
Answer & Solution
Correct Answer
(D) \(\tan x+\tan y\)
Step-by-step Solution
Detailed explanation
\(\sin (x+y) \cdot \sec x \cdot \sec y\) \(=\frac{\sin x \cdot \cos y+\cos x \cdot \sin y}{\cos x \cdot \cos y}=\tan x+\tan y\)
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