27. If cos(A+B)= 0 and costA-E) =
find A and B.
0° <A +B590° and A>B, then
है, जहाँ 0° <A - B 590% तथा A > 3 है,
यदि costA +B) = 0 तथा cos|A-B)
तो A तथा B ज्ञात कीजिए।
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