Use the fact that 4 cos2(2π/5) + 2 cos(2π/5) -1 = 0 to prove thata regular pentagon is constructible.

Q: tanx)-sinx) lis sintx) 1/2. -5/4 O 7/2 o 5/4 O

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Q: موضوع الدرس: Find the sewera (BY COS X + 4X +2x S * 6 ution of Jdx + (3 $ inx+3) dy ap

A: The given differential equation is         (3ycos x + 4xex + 2x2ex)dx + (3sin x + 3)dy = 0 We can…

Q: If the root of C.E. are (-2, -2, 0, ±2i) then yH = (a) A + Be-2x + Be-2* + Dcos2x + Esin2x (b) A +…

A: We have to find the following

Q: ZA'B'C' is the image of LABC following the reflec- tion of ZABC across line (. If mZA'B'C'= + 20 and…

A: Given: m∠A'B'C'=x5+20, m∠ABC=x2+5 We know that when we take reflection of a triangle across any line…

Q: - Z= 5(cos60° + jsin60°) (7/40°) (6-j5)-4e-j5

A: The given problem is to evaluate and simplify the given complex expression.

Q: tane de sece 4 Q10 3 7 a) 2-2 b) (2 1) c) 24-2 d) (2 -1) 1/3 1/5 5/4

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Q: Given that z = cos + isin and u-iv-(1+z)(1-22). Show that 30 v = utan 2 r = 4² cos² (2). where r is…

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Q: 4. Evaluate these complex numbers: (a) (40/50° + 20/-30°)¹/2

A: Since you have asked multiple questions, we can solve first question for you. If you want other…

Q: +jsin- 12 12 + jsin 2. Simplify 3 cos .Express answer in rectangular form.

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Q: J. (cos x + |cos x| ) dx S. %3D 2

A: see 2nd step

Q: Evakate: fcos 2xdx cos2x, cos 2x +C A sin2x sin 2x B 6 +C sin2x, sin 2x +C 6 2 cos2x cos 2x +C D 2

A: To evaluate: I=∫cos32x dx

Q: (d) |z1|²+z+i|² < 2.

A: