if sin4theta ÷a + cos4theta÷b = 1÷ a+b then sin8theta÷a3 + cos8theta÷b3 = - 1 ÷ (a+b)
- 1 ÷ (a+b)2
- 1 ÷ (a+b)3
- none.
if sin4theta ÷a + cos4theta÷b = 1÷ a+b then sin8theta÷a3 + cos8theta÷b3 =
- 1 ÷ (a+b)
- 1 ÷ (a+b)2
- 1 ÷ (a+b)3
- none.
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