Question and Answers Forum

AllQuestion and Answers: Page 564

Question Number 156321 Answers: 0 Comments: 1

cos^4 ((π/9))+cos^4 (((2π)/9))+cos^4 (((3π)/9))+cos^4 (((4π)/9))=?

$$\:\:\mathrm{cos}\:^{\mathrm{4}} \left(\frac{\pi}{\mathrm{9}}\right)+\mathrm{cos}\:^{\mathrm{4}} \left(\frac{\mathrm{2}\pi}{\mathrm{9}}\right)+\mathrm{cos}\:^{\mathrm{4}} \left(\frac{\mathrm{3}\pi}{\mathrm{9}}\right)+\mathrm{cos}\:^{\mathrm{4}} \left(\frac{\mathrm{4}\pi}{\mathrm{9}}\right)=? \\ $$

Question Number 156319 Answers: 1 Comments: 1

∫ ((36)/((12cos x+5sin x)^2 )) dx=?

$$\:\int\:\frac{\mathrm{36}}{\left(\mathrm{12cos}\:\mathrm{x}+\mathrm{5sin}\:\mathrm{x}\right)^{\mathrm{2}} }\:\mathrm{dx}=? \\ $$

Question Number 156316 Answers: 3 Comments: 1

Question Number 156313 Answers: 0 Comments: 0

rationalize (2/( (2)^(1/3) −(6)^(1/3) −(9)^(1/3) ))

$$\:\mathrm{rationalize}\:\frac{\mathrm{2}}{\:\sqrt[{\mathrm{3}}]{\mathrm{2}}−\sqrt[{\mathrm{3}}]{\mathrm{6}}−\sqrt[{\mathrm{3}}]{\mathrm{9}}}\: \\ $$

Question Number 156308 Answers: 0 Comments: 0

Find exact form sin 1°

$$\mathrm{Find}\:\mathrm{exact}\:\mathrm{form}\:\mathrm{sin}\:\mathrm{1}° \\ $$

Question Number 156305 Answers: 1 Comments: 0

∫ ((sec^2 (x))/(3sin^2 (x)−1)) dx

$$\:\:\int\:\frac{\mathrm{sec}\:^{\mathrm{2}} \left(\mathrm{x}\right)}{\mathrm{3sin}\:^{\mathrm{2}} \left(\mathrm{x}\right)−\mathrm{1}}\:\mathrm{dx} \\ $$

Question Number 156296 Answers: 0 Comments: 4

Question Number 156295 Answers: 2 Comments: 0

Question Number 156292 Answers: 0 Comments: 0

(1/3)+(3/(3×7))+(5/(3×7×11))+(7/(3×7×11×15))+…

$$\frac{\mathrm{1}}{\mathrm{3}}+\frac{\mathrm{3}}{\mathrm{3}×\mathrm{7}}+\frac{\mathrm{5}}{\mathrm{3}×\mathrm{7}×\mathrm{11}}+\frac{\mathrm{7}}{\mathrm{3}×\mathrm{7}×\mathrm{11}×\mathrm{15}}+\ldots \\ $$

Question Number 156290 Answers: 0 Comments: 0

Question Number 156281 Answers: 2 Comments: 0

∫_(−3) ^5 (√(∣x∣^3 ))dx

$$\int_{−\mathrm{3}} ^{\mathrm{5}} \:\sqrt{\mid{x}\mid^{\mathrm{3}} }{dx} \\ $$

Question Number 156275 Answers: 1 Comments: 0

Helllo to All Good (morning night) we are her too shar our knowelegdes we must respect evrey one we need that positiv energy sorry for my English

$${Helllo}\:{to}\:{All}\:{Good}\:\left({morning}\:{night}\right) \\ $$$${we}\:{are}\:{her}\:{too}\:{shar}\:{our}\:{knowelegdes} \\ $$$${we}\:{must}\:{respect}\:{evrey}\:{one}\:{we}\:{need}\:{that} \\ $$$${positiv}\:{energy}\:{sorry}\:{for}\:{my}\:{English} \\ $$$$ \\ $$

Question Number 156270 Answers: 1 Comments: 1

Show that i = sin^(− 1) (((√2)/2))^2 in air, if the refractive index n = ((sin^2 (60))/(sin^2 (45)))

$$\mathrm{Show}\:\mathrm{that}\:\:\:\:\:\:\mathrm{i}\:\:\:\:=\:\:\:\mathrm{sin}^{−\:\mathrm{1}} \left(\frac{\sqrt{\mathrm{2}}}{\mathrm{2}}\right)^{\mathrm{2}} \:\:\:\:\mathrm{in}\:\mathrm{air},\:\mathrm{if}\:\mathrm{the}\:\mathrm{refractive} \\ $$$$\mathrm{index}\:\:\:\:\:\:\:\:\mathrm{n}\:\:\:=\:\:\:\frac{\mathrm{sin}^{\mathrm{2}} \left(\mathrm{60}\right)}{\mathrm{sin}^{\mathrm{2}} \left(\mathrm{45}\right)} \\ $$

Question Number 156259 Answers: 0 Comments: 0

Question Number 156257 Answers: 0 Comments: 0

∫ ((xsin^(−1) (x^2 ))/(1−x^4 )) dx=?

$$\:\int\:\frac{{x}\mathrm{sin}^{−\mathrm{1}} \left({x}^{\mathrm{2}} \right)}{\mathrm{1}−{x}^{\mathrm{4}} }\:{dx}=? \\ $$

Question Number 156253 Answers: 1 Comments: 0

Question Number 156252 Answers: 1 Comments: 1

Question Number 156250 Answers: 0 Comments: 1

lim_(x→0) ((1−cos x (√(cos 2x)) ((cos 3x))^(1/3) ((cos 4x))^(1/4) )/x^2 ) =?

$$\:\:\:\:\underset{{x}\rightarrow\mathrm{0}} {\mathrm{lim}}\:\frac{\mathrm{1}−\mathrm{cos}\:\mathrm{x}\:\sqrt{\mathrm{cos}\:\mathrm{2x}}\:\sqrt[{\mathrm{3}}]{\mathrm{cos}\:\mathrm{3x}}\:\sqrt[{\mathrm{4}}]{\mathrm{cos}\:\mathrm{4x}}}{\mathrm{x}^{\mathrm{2}} }\:=? \\ $$

Question Number 156248 Answers: 1 Comments: 0

Question Number 156244 Answers: 1 Comments: 0

solve the pairs of simultaneous equations ax−2y=2 x+3y=3 qy−px=(q^2 −p^2 )/pq py+qx=2

$${solve}\:{the}\:{pairs}\:{of}\:{simultaneous}\:{equations} \\ $$$${ax}−\mathrm{2}{y}=\mathrm{2} \\ $$$${x}+\mathrm{3}{y}=\mathrm{3} \\ $$$${qy}−{px}=\left({q}^{\mathrm{2}} −{p}^{\mathrm{2}} \right)/{pq} \\ $$$${py}+{qx}=\mathrm{2} \\ $$

Question Number 156240 Answers: 0 Comments: 3

∫^(π/2) _((−π)/2) ∣sin(x)∣ dx ∫^π _0 ∣cos(x)∣dx

$$\underset{\frac{−\pi}{\mathrm{2}}} {\int}^{\frac{\pi}{\mathrm{2}}} \mid{sin}\left({x}\right)\mid\:{dx} \\ $$$$\underset{\mathrm{0}} {\int}^{\pi} \mid{cos}\left({x}\right)\mid{dx} \\ $$

Question Number 156269 Answers: 0 Comments: 1

Question Number 156229 Answers: 0 Comments: 4

∫_0 ^( (π/4)) ln(sin(2x)+cos(3x)) dx

$$\: \\ $$$$\:\:\:\:\int_{\mathrm{0}} ^{\:\frac{\pi}{\mathrm{4}}} \:\mathrm{ln}\left(\mathrm{sin}\left(\mathrm{2}{x}\right)+\mathrm{cos}\left(\mathrm{3}{x}\right)\right)\:{dx} \\ $$$$\: \\ $$

Question Number 156228 Answers: 1 Comments: 0

∫_0 ^( 1) ((log^3 (1−x^2 ))/x^3 ) dx

$$\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\int_{\mathrm{0}} ^{\:\mathrm{1}} \:\frac{\mathrm{log}^{\mathrm{3}} \left(\mathrm{1}−{x}^{\mathrm{2}} \right)}{{x}^{\mathrm{3}} }\:{dx} \\ $$$$\: \\ $$

Question Number 156224 Answers: 0 Comments: 1

∫_0 ^( 1) (1/( (√(ln(x^2 )+1)) )) dx

$$\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\int_{\mathrm{0}} ^{\:\mathrm{1}} \:\frac{\mathrm{1}}{\:\sqrt{\mathrm{ln}\left({x}^{\mathrm{2}} \right)+\mathrm{1}}\:}\:{dx} \\ $$$$\: \\ $$

Question Number 156222 Answers: 0 Comments: 1

∫_0 ^( 1) ln((sin(x)cos(x))^2 +1) dx

$$\: \\ $$$$\:\:\:\:\int_{\mathrm{0}} ^{\:\mathrm{1}} \:\mathrm{ln}\left(\left(\mathrm{sin}\left({x}\right)\mathrm{cos}\left({x}\right)\right)^{\mathrm{2}} +\mathrm{1}\right)\:{dx} \\ $$$$\: \\ $$

Pg 559 Pg 560 Pg 561 Pg 562 Pg 563 Pg 564 Pg 565 Pg 566 Pg 567 Pg 568

Contact: info@tinkutara.com