Nilai dari cos3π8+cos3π10=....\cos\frac{3\pi}{8}+\cos\frac{3\pi}{10}=....cos83π+cos103π=.... (Gunakan kalkulator)
0,54160,54160,5416
0,84120,84120,8412
0,97020,97020,9702
0,70380,70380,7038
0,62510,62510,6251