Trigonometry – Page 9

Question-208638

Tinku Tara June 20, 2024 Trigonometry 0 Comments

Question Number 208638 by lmcp1203 last updated on 20/Jun/24 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question-208437

Tinku Tara June 16, 2024 Trigonometry 0 Comments

Question Number 208437 by efronzo1 last updated on 16/Jun/24 Answered by som(math1967) last updated on 16/Jun/24 $a = s i n 84 + c o s 66$ $\Rightarrow a = s i n 84 + s i n 24$ $\Rightarrow a = 2 s i n 54 c o s 30$ $∴ a = 2 \times \frac{\sqrt{5} + 1}{4} \times \frac{\sqrt{3}}{2} = \frac{\sqrt{3} (\sqrt{5} + 1)}{4}$ $${b}={sin}\mathrm{48}−{sin}\mathrm{12}…

cos-2pi-21-cos-4pi-21-cos-8pi-21-cos-10pi-22-cos-16pi-21-cos-20pi-21-

Tinku Tara June 9, 2024 Trigonometry 0 Comments

Question Number 208252 by efronzo1 last updated on 09/Jun/24 $\cos (\frac{2 π}{21}) \cos (\frac{4 π}{21}) \cos (\frac{8 π}{21}) \cos (\frac{10 π}{22}) \cos (\frac{16 π}{21}) \cos (\frac{20 π}{21}) = ?$ Answered by som(math1967) last updated on 09/Jun/24 $l e t \frac{π}{21} = x$ $c o s 2 x c o s 4 x c o s 8 x c o s 10 x c o s 16 x c o s 20 x$ $${cosxcos}\mathrm{2}{xcos}\mathrm{4}{xcos}\mathrm{8}{xcos}\mathrm{10}{xcos}\mathrm{5}{x} \…

1-cos-x-cos-3x-1-cos-x-cos-5x-1-cos-x-cos-7x-1-cos-x-cos-11x-

Tinku Tara June 6, 2024 Trigonometry 0 Comments

Question Number 208130 by efronzo1 last updated on 06/Jun/24 $\frac{1}{\cos x - \cos 3 x} + \frac{1}{\cos x - \cos 5 x} +$ $\frac{1}{\cos x - \cos 7 x} + \frac{1}{\cos x - \cos 11 x} = ?$ Answered by Ghisom last updated on 06/Jun/24 $let c_{n} = \cos n x$ $$=−\frac{\mathrm{2}{c}_{\mathrm{10}}…

Question-208104

Tinku Tara June 5, 2024 Trigonometry 0 Comments

Question Number 208104 by Coolkhid999 last updated on 05/Jun/24 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question-207925

Tinku Tara May 30, 2024 Trigonometry 0 Comments

Question Number 207925 by lmcp1203 last updated on 30/May/24 Commented by lmcp1203 last updated on 31/May/24 $p r o o f α = 20$ Answered by Frix last updated on…

3-sin-cos-4-6-sin-cos-2-4-sin-6-cos-6-

Tinku Tara May 17, 2024 Trigonometry 0 Comments

Question Number 207516 by MATHEMATICSAM last updated on 17/May/24 $3 {(\sin θ - \cos θ)}^{4} + 6 {(\sin θ + \cos θ)}^{2}$ $+ 4 (\sin^{6} θ + \cos^{6} θ) = ?$ Commented by A5T last updated on 17/May/24 $${Did}\:{you}\:{edit}\:{this}\:{question}\:{to}\:{change}\:{something}?…

Relating-to-question-207407-x-3-12x-2-27x-17-0-Let-x-t-4-t-3-21t-37-0-The-Trigonometric-Solution-gives-these-x-1-4-2-7-cos-pi-2sin-1-37-7-98-6-x-2-4-2-7-sin-sin-1-37-7-

Tinku Tara May 15, 2024 Trigonometry 0 Comments

Question Number 207434 by Frix last updated on 22/May/24 $Relating to question 207407$ $x^{3} - 12 x^{2} + 27 x - 17 = 0$ $Let x = t + 4$ $t^{3} - 21 t - 37 = 0$ $The Trigonometric Solution gives these :$ $${x}_{\mathrm{1}} =\mathrm{4}−\mathrm{2}\sqrt{\mathrm{7}}\mathrm{cos}\:\frac{\pi+\mathrm{2sin}^{−\mathrm{1}} \:\frac{\mathrm{37}\sqrt{\mathrm{7}}}{\mathrm{98}}}{\mathrm{6}}…

f-x-cos2x-cos3x-cos4x-cos6x-cosx-cos5x-evaluar-f-2pi-13-

Tinku Tara May 5, 2024 Trigonometry 0 Comments

Question Number 207065 by manxsol last updated on 05/May/24 $f (x) = [c o s 2 x + c o s 3 x] [c o s 4 x + c o s 6 x] [[c o s x + c o s 5 x]$ $e v a l u a r f (\frac{2 π}{13})$ Answered by Berbere last updated on 06/May/24 $$\left.\mathrm{4}{cos}\left({x}\right){cos}\left(\mathrm{5}{x}\right){cos}\left(\mathrm{2}{x}\right){cos}\left(\mathrm{3}{x}\right).\left[{cos}\left(\mathrm{2}{x}\right)+{cos}\left(\:\mathrm{3}{x}\right)\right]\right]{a}\mathrm{2}\left(\right. \…

If-sin-m-2-2mn-m-2-2mn-2n-2-then-prove-that-tan-m-2-2mn-2mn-2n-2-

Tinku Tara May 2, 2024 Trigonometry 0 Comments

Question Number 206970 by MATHEMATICSAM last updated on 02/May/24 $If \sin θ = \frac{m^{2} + 2 m n}{m^{2} + 2 m n + 2 n^{2}} then prove$ $that \tan θ = \frac{m^{2} + 2 m n}{2 m n + 2 n^{2}} .$ Answered by Rasheed.Sindhi last updated on…

Category: Trigonometry