1) $2cosx + \sqrt{2}sin10x = 3\sqrt{2} + 2cos28xsinx$
2) $2^{\left | sinx \right |}$ + $\left | sinx \right |= sin^{2}x +cosx$
3) $cos^{13}x + sin^{14}x = 1$
1) $2cosx + \sqrt{2}sin10x = 3\sqrt{2} + 2cos28xsinx$
2) $2^{\left | sinx \right |}$ + $\left | sinx \right |= sin^{2}x +cosx$
3) $cos^{13}x + sin^{14}x = 1$
1) $2cosx + \sqrt{2}sin10x = 3\sqrt{2} + 2cos28xsinx$
2) $2^{\left | sinx \right |}$ + $\left | sinx \right |= sin^{2}x +cosx$
3) $cos^{13}x + sin^{14}x =1
3. sin14x + cos13x = 1
=> cos13x = cos14x
<=> cos13x.(cosx-1)=0
<=> cosx=0 hoac cosx=1
...
Learning is the only thing the mind never exhausts, never fears, and never regrets - Leonardo da Vinci
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