π | π | |||
h) cos2(α+ | )−cos2(α− | ) | ||
4 | 4 |
π | π | π | π | |||||
( cos(α+ | )−cos(α− | ) ) ( cos(α+ | )+cos(α− | ) ) | ||||
2 | 2 | 2 | 2 |
1 | ||
i) (cosa+cos3a)+cos2a = 2cos2a*cosa+cos2a = 2cos2a(cosa+ | )= | |
2 |
a | π | a | π | |||||
=4cos2a*cos( | + | )*cos( | − | ) | ||||
2 | 6 | 2 | 6 |
5^2 | 52 |
2^{10} | 210 |
a_2 | a2 |
a_{25} | a25 |
p{2} | √2 |
p{81} | √81 |
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