Question
Download Solution PDFsin (a + b) = 1 మరియు cos (a - b) = \(\frac{1}{2} \) అయితే, a విలువను కనుగొనండి.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFఇచ్చినవి:
sin(A + B) = 1 మరియు cos(A - B) = 1/2
ఉపయోగించిన సూత్రాలు:
sin90° = 1
cos60° = 1/2
గణన:
sin(A + B) = 1
⇒ sin(A + B) = sin90°
⇒ A + B = 90° ....(1)
మళ్ళీ,
cos(A - B) = 1/2
⇒ cos(A - B) = cos60°
⇒ A - B = 60° .....(2)
సమీకరణం (1) మరియు (2) లను కలిపితే,
⇒ A + B + A - B = (90° + 60°)
⇒ 2A = 150°
⇒ A = (150/2)
⇒ A = 75°
a విలువ 75°.
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