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Question Number 89599 by 20000193 last updated on 18/Apr/20

Commented by john santu last updated on 18/Apr/20

4a) tan (A+C) =((tan A+tan C)/(1−tan A.tan C)) case (1) = (((1/(√3)) + (√3))/(1−(1/(√3)).(√3))) = ∞ (undefined ) case (2) = (((1/(√3)) − (√3))/(1+(1/(√3)).(√3))) = ((−2)/(2(√3))) = −(1/(√3)) case (3) = (((1/(√3))+(√3))/(1+(1/(√3)).(√3))) = (4/(2(√3))) = (2/(√3)) case (4) = case (1) undefined

$$\left.\mathrm{4}{a}\right)\:\mathrm{tan}\:\left({A}+{C}\right)\:=\frac{\mathrm{tan}\:{A}+\mathrm{tan}\:{C}}{\mathrm{1}−\mathrm{tan}\:{A}.\mathrm{tan}\:{C}} \\ $$$$\:{case}\:\left(\mathrm{1}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}\:+\:\sqrt{\mathrm{3}}}{\mathrm{1}−\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\infty\:\left({undefined}\:\right) \\ $$$${case}\:\left(\mathrm{2}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}\:−\:\sqrt{\mathrm{3}}}{\mathrm{1}+\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\frac{−\mathrm{2}}{\mathrm{2}\sqrt{\mathrm{3}}}\:=\:−\frac{\mathrm{1}}{\sqrt{\mathrm{3}}} \\ $$$${case}\:\left(\mathrm{3}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}+\sqrt{\mathrm{3}}}{\mathrm{1}+\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\frac{\mathrm{4}}{\mathrm{2}\sqrt{\mathrm{3}}}\:=\:\frac{\mathrm{2}}{\sqrt{\mathrm{3}}} \\ $$$${case}\:\left(\mathrm{4}\right)\:=\:{case}\:\left(\mathrm{1}\right)\:{undefined} \\ $$

Commented by mr W last updated on 18/Apr/20

to 20000193: please don′t misuse this platform to let other people do home work for you!

$${to}\:\mathrm{20000193}: \\ $$$${please}\:{don}'{t}\:{misuse}\:{this}\:{platform}\:{to} \\ $$$${let}\:{other}\:{people}\:{do}\:{home}\:{work}\:{for}\:{you}! \\ $$

Commented by mr W last updated on 18/Apr/20

i think we should not remunerate people who just copy and throw their home work here, even don′t make the effort to type where he or she has problem,but expect that somebody will do all the things for him or her. this forum helps people who try to help themselves!

$${i}\:{think}\:{we}\:{should}\:{not}\:{remunerate} \\ $$$${people}\:{who}\:{just}\:{copy}\:{and}\:{throw}\:{their} \\ $$$${home}\:{work}\:{here},\:{even}\:{don}'{t}\:{make}\:{the} \\ $$$${effort}\:{to}\:{type}\:{where}\:{he}\:{or}\:{she}\:{has} \\ $$$${problem},{but}\:{expect}\:{that}\:{somebody}\:{will} \\ $$$${do}\:{all}\:{the}\:{things}\:{for}\:{him}\:{or}\:{her}. \\ $$$$ \\ $$$${this}\:{forum}\:{helps}\:{people}\:{who}\:{try}\:{to} \\ $$$${help}\:{themselves}! \\ $$

Commented by john santu last updated on 18/Apr/20

i′m sorry sir.

$${i}'{m}\:{sorry}\:{sir}.\: \\ $$

Commented by mr W last updated on 18/Apr/20

never mind sir! it′s just my opinion.

$${never}\:{mind}\:{sir}!\:{it}'{s}\:{just}\:{my}\:{opinion}. \\ $$

Commented by Kunal12588 last updated on 18/Apr/20

I just want to know does engineering maths is of this level ?

$${I}\:{just}\:{want}\:{to}\:{know}\:{does}\:{engineering}\:{maths} \\ $$$${is}\:{of}\:{this}\:{level}\:? \\ $$

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