Trigonometry – Page 132

If-a-b-and-A-of-a-triangle-are-fixed-and-two-possible-values-of-the-third-side-be-c-1-and-c-2-such-that-c-1-2-c-1-c-2-c-2-2-a-2-then-find-angle-A-

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Question Number 21889 by ajfour last updated on 06/Oct/17 $I f a, b, a n d A o f a t r i a n g l e a r e$ $f i x e d a n d t w o p o s s i b l e v a l u e s o f t h e$ $t h i r d s i d e b e c_{1} a n d c_{2} s u c h t h a t$ $$\boldsymbol{{c}}_{\mathrm{1}} ^{\mathrm{2}} +\boldsymbol{{c}}_{\mathrm{1}} \boldsymbol{{c}}_{\mathrm{2}} +\boldsymbol{{c}}_{\mathrm{2}} ^{\mathrm{2}} =\boldsymbol{{a}}^{\mathrm{2}} ,\:{then}\:{find}\:{angle}\:{A}.…

prove-that-sin-x-2-sin-x-sin-3x-sin-x-2sin-x-sin-3x-tan-2-x-2-

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Question Number 87424 by Rio Michael last updated on 04/Apr/20 $prove that \frac{\sin x - 2 \sin x + \sin 3 x}{\sin x + 2 \sin x + \sin 3 x} \equiv - \tan^{2} (\frac{x}{2})$ Commented by john santu last updated on 04/Apr/20 $$\frac{\mathrm{sin}\:\mathrm{3x}−\mathrm{sin}\:\mathrm{x}}{\mathrm{sin}\:\mathrm{3x}+\mathrm{3sin}\:\mathrm{x}}\:=\:\frac{\mathrm{2cos}\:\mathrm{2x}\:\mathrm{sin}\:\mathrm{x}}{\mathrm{3sin}\:\mathrm{x}−\mathrm{4sin}\:^{\mathrm{3}} \mathrm{x}+\mathrm{3sin}\:\mathrm{x}} \…

if-equation-sin-x-sec-x-2tan-x-1-0-has-roots-x-1-amp-x-2-then-the-possible-value-of-sin-x-1-cos-x-2-a-4-5-b-3-4-c-4-3-d-3-2-e-2-

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Question Number 87419 by john santu last updated on 04/Apr/20 $if equation \sin x + \sec x - 2 \tan x - 1 = 0$ $has roots x_{1} & x_{2}, then the$ $possible value of \sin x_{1} - \cos x_{2} ?$ $(a) 4 / 5 (b) 3 / 4 (c) 4 / 3$ $(d) 3 / 2 (e) 2$ …

sin18-0-

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Question Number 21815 by gopikrishnan005@gmail.com last updated on 04/Oct/17 $s i n 18^{0} =$ Commented by Tinkutara last updated on 04/Oct/17 $\frac{\sqrt{5} - 1}{4}$ Commented by…

cos-pi-7-1-3-cos-3pi-7-1-3-cos-5pi-7-1-3-

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Question Number 87250 by john santu last updated on 03/Apr/20 $\sqrt[3]{\cos \frac{π}{7}} + \sqrt[3]{\cos \frac{3 π}{7}} + \sqrt[3]{\cos \frac{5 π}{7}} = ?$ Terms of Service Privacy Policy Contact: info@tinkutara.com

By-eliminating-show-that-x-2-y-2-if-x-sin-3-y-cos-3-sin-and-x-sin-y-cos-0-

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Question Number 152715 by Tawa11 last updated on 31/Aug/21 $By eliminating θ, show that x^{2} = - y^{2},$ $if x \sin^{3} θ + y \cos^{3} θ = \sin θ and x \sin θ - y \cos θ = 0$ Commented by Tawa11 last updated on 02/Sep/21…

Question-87065

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Question Number 87065 by Power last updated on 02/Apr/20 Commented by MJS last updated on 02/Apr/20 $2$ Commented by Power last updated on…

If-1-n-sin-2-1-n-cos-2-1-n-find-tan-2-

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Question Number 21453 by Joel577 last updated on 24/Sep/17 $If$ $(1 + n) \sin 2 θ + (1 - n) \cos 2 θ = 1 + n$ $find \tan 2 θ$ Answered by $@ t y @ m l a s t u p d a t e d o n 24 / S e p / 17$ $\left(\mathrm{1}−{n}\right)\mathrm{cos}\:\mathrm{2}\theta=\left(\mathrm{1}+{n}\right)\left(\mathrm{1}−\mathrm{sin}\:\mathrm{2}\theta\right) \…

In-any-ABC-a-b-cos-C-c-cos-B-

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Question Number 21431 by Tinkutara last updated on 23/Sep/17 $In any Δ A B C, a (b \cos C - c \cos B) =$ Answered by $@ t y @ m l a s t u p d a t e d o n 23 / S e p / 17$ $= a b \cos C - a c \cos B$ $$$=\frac{{a}^{\mathrm{2}} +{b}^{\mathrm{2}} −{c}^{\mathrm{2}} }{\mathrm{2}}−\frac{{c}^{\mathrm{2}}…

In-any-ABC-a-2-sin-B-sin-C-

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Question Number 21429 by Tinkutara last updated on 23/Sep/17 $In any Δ A B C, Σ a^{2} (\sin B - \sin C) =$ Answered by $@ t y @ m l a s t u p d a t e d o n 23 / S e p / 17$ $W e h a v e$ $$ \frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} = k, s a y$ $$\therefore\Sigma{a}^{\mathrm{2}}…

Category: Trigonometry