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Maths-

General

Easy

Question

The value of $tan invisible function application 9 degree minus tan invisible function application 27 degree minus tan invisible function application 63 degree plus tan invisible function application 81 degree blank i s$

2
3
4
None of these

The correct answer is: 4

We have $tan invisible function application 9 degree minus tan invisible function application 27 degree minus tan invisible function application 63 degree plus tan invisible function application 81 degree equals open parentheses tan invisible function application 9 degree plus tan invisible function application 81 degree close parentheses minus open parentheses tan invisible function application 27 degree plus tan invisible function application 63 degree close parentheses$
$equals fraction numerator 1 over denominator sin invisible function application 9 degree cos invisible function application 9 degree end fraction minus fraction numerator 1 over denominator sin invisible function application 27 degree cos invisible function application 27 degree end fraction$
$equals fraction numerator 2 over denominator sin invisible function application 18 degree end fraction minus fraction numerator 2 over denominator sin invisible function application 54 degree end fraction$
$equals 2 open square brackets fraction numerator sin invisible function application 54 degree minus sin invisible function application 18 degree over denominator sin invisible function application 54 degree sin invisible function application 18 degree end fraction close square brackets$
$equals 2 open square brackets fraction numerator 2 cos invisible function application 36 degree sin invisible function application 18 degree over denominator sin invisible function application 18 degree cos invisible function application 36 degree end fraction close square brackets equals 4$

Related Questions to study

If $blank sin invisible function application x plus cos invisible function application x equals fraction numerator square root of 7 over denominator 2 end fraction blank$ where $blank x element of A comma$ then $tan invisible function application fraction numerator x over denominator 2 end fraction blank$ is equal to

If $blank sin invisible function application x plus cos invisible function application x equals fraction numerator square root of 7 over denominator 2 end fraction blank$ where $blank x element of A comma$ then $tan invisible function application fraction numerator x over denominator 2 end fraction blank$ is equal to

If $fraction numerator 3 pi over denominator 4 end fraction less than alpha less than pi comma blank$ then $square root of 2 cot invisible function application alpha plus fraction numerator 1 over denominator sin to the power of 2 end exponent invisible function application alpha end fraction end root blank$ is equal to

If $fraction numerator 3 pi over denominator 4 end fraction less than alpha less than pi comma blank$ then $square root of 2 cot invisible function application alpha plus fraction numerator 1 over denominator sin to the power of 2 end exponent invisible function application alpha end fraction end root blank$ is equal to

Hydrogen burns in air with a

Hydrogen burns in air with a

Chemistry-General

parallel

Metal hydride on treatment with water gives

Metal hydride on treatment with water gives

Chemistry-General

Which is used hydrogen generators

Which is used hydrogen generators

Chemistry-General

Assertion:First ionization energy for nitrogen is lower than oxygen.
Reason :Across a period effective nuclear charge decreases.

Assertion:First ionization energy for nitrogen is lower than oxygen.
Reason :Across a period effective nuclear charge decreases.

Chemistry-General

parallel

Assertion :Outermost electronic configuration of most electropositive elements is ns² np³.
Reason :ns² np³is stable due to half filled subshell.

Assertion :Outermost electronic configuration of most electropositive elements is ns² np³.
Reason :ns² np³is stable due to half filled subshell.

Physics-General

Assertion :NO^– ion is isoelectronic with CN^– ion.
Reason :Isoelectronic ions have same number of elelctrons.

Assertion :NO^– ion is isoelectronic with CN^– ion.
Reason :Isoelectronic ions have same number of elelctrons.

Physics-General

Assertion :I.E. of ₇N is more than that of ₈O as well as ₆C.
Reason : This is due to difference in reactivity towards oxygen.

Assertion :I.E. of ₇N is more than that of ₈O as well as ₆C.
Reason : This is due to difference in reactivity towards oxygen.

Physics-General

parallel

Assertion :Ground state configuration of Cr is 3d⁵, 4s¹.
Reason : A set of half filled orbitals containing one electron each with their spin parallel provides extra stability to the system.

Assertion :Ground state configuration of Cr is 3d⁵, 4s¹.
Reason : A set of half filled orbitals containing one electron each with their spin parallel provides extra stability to the system.

Physics-General

Assertion :More is the electron affinity greater is the reducing character.
Reason : Reducing character depends on number of electrons gained.

Assertion :More is the electron affinity greater is the reducing character.
Reason : Reducing character depends on number of electrons gained.

Physics-General

Assertion :Ionization potential across the period is Na < Al < Mg < Si.
Reason : Ionization potential decreases with decrease in atomic size.

Assertion :Ionization potential across the period is Na < Al < Mg < Si.
Reason : Ionization potential decreases with decrease in atomic size.

Physics-General

parallel

Assertion :Shielding effect increases as we go down the group.
Reason : More is the number of electrons in the penultimate shell, more is shielding.

Assertion :Shielding effect increases as we go down the group.
Reason : More is the number of electrons in the penultimate shell, more is shielding.

Physics-General

Assertion :Ionization enthalpy is always negative.
Reason : Energy is always released when electrons are removed.

Assertion :Ionization enthalpy is always negative.
Reason : Energy is always released when electrons are removed.

Physics-General

Assertion :Chemistry of Actinoids is more complicated than Lanthanoids.
Reason : Actinoid elements are radioactive.

Assertion :Chemistry of Actinoids is more complicated than Lanthanoids.
Reason : Actinoid elements are radioactive.

Physics-General

parallel

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