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If cosec2A + cot2A = 31, find sinA where 0 < A < 90.
  • a)
    1/4
  • b)
    1/3
  • c)
    1/2
  • d)
    1/5
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
If cosec2A + cot2A = 31, find sinA where 0 < A < 90.a)1/4b)1/3c)...
cosec2A + cot2A = 31 (Given)     ---- (1)
cosec2A – cot2A = 1 (Identity)     ---- (2)
Adding equation (1) and (2) we get
2 cosec2A = 32
⇒ cosec2A = 16
⇒ sinA = 1/4
Most Upvoted Answer
If cosec2A + cot2A = 31, find sinA where 0 < A < 90.a)1/4b)1/3c)...
cosec2A + cot2A = 31 (Given)     ---- (1)
cosec2A – cot2A = 1 (Identity)     ---- (2)
Adding equation (1) and (2) we get
2 cosec2A = 32
⇒ cosec2A = 16
⇒ sinA = 1/4
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If cosec2A + cot2A = 31, find sinA where 0 < A < 90.a)1/4b)1/3c)1/2d)1/5Correct answer is option 'A'. Can you explain this answer?
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