1) Cos4x=1-8 Sin2x cosbe
11) Cosbu = 32 Cos 6x +48 Cose + 18 cos²x-1
9 (8) SPA - 16 x - 30 C x +509)
_v) tan 40 = 4 tand li-tan?o) .
In 6 tan² ottanto
ottan 30 - 460.20. Cos 40
mso-tan 30
d. (i) Sin 36° (i) Cos 18"
ej (Cos?u8º-Sim ?120) = VS+L
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