Mathematics
Evaluate :
cosec (65° + A) - sec (25° - A)
Trigonometric Identities
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Answer
Solving,
⇒ cosec (65° + A) - sec (25° - A)
⇒ cosec [90° - (25° - A)] - sec (25° - A)
By formula,
cosec(90° - θ) = sec θ
⇒ sec (25° - A) - sec (25° - A)
⇒ 0.
Hence, cosec (65° + A) - sec (25° - A) = 0.
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