Q71. cosec [2 cot−1(5) + cos−1( 54 )] is equal to: (1) 65 (2) 75 56 56 (3) 65 (4) 56 33 33
What This Question Tests
This question tests the ability to simplify expressions involving inverse trigonometric functions by converting them to a common form and then applying trigonometric identities.
Concepts Tested
Formulas Used
2 cot^-1(x) = tan^-1(2x/(x^2-1))
cos^-1(x) = tan^-1(sqrt(1-x^2)/x)
cosec(A+B)
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📋 Question Details
- Chapter
- Inverse Trigonometric Functions
- Topic
- Properties of inverse trigonometric functions
- Year
- 2021
- Shift
- 25 Feb Shift 2
- Q Number
- Q71
- Type
- MCQ
- NCERT Ref
- Class 12 Mathematics Ch 2: Inverse Trigonometric Functions
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