Question

find x+y+z. 90 find x,y,z​ with full explanation​​

Answer 1

Answer:

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If (Sec A + tan A ) (SecB + tanB) (Sec C + tanC) = (Sec A -tanA) (Sec B - tan B) (Sec C - tan C ) . Prove that each of the side is equal to ±1 .

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