TS EAMCET · Maths · Inverse Trigonometric Functions
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given that, 2tan-115+sec-1527+2tan-118 =2tan-115+2tan-118+sec-1527 =2tan-115+tan-118+sec-1527 =2tan-115+181-15·18+sec-1527 ∴ tan-1A+tan-1B=tan-1A+B1-AB =2tan-18+540-1+sec-1527 =2tan-11339+sec-1527 =2tan-113+sec-1527 =tan-12×131-132+sec-1527…
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