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2cos^[email protected]+2sin^[email protected]=2
Bagi 2
Dapatnya cos^[email protected]+sin^[email protected]=1
Terbukti
No 2
Pindah silang kedua persamaan
Jdinya cos^[email protected]=1-sin^[email protected]
Cos^[email protected]+sin^[email protected]=1
Terbukti