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Maths-

General

Easy

Question

If sin $theta plus$ cos $theta equals$ m and sec $theta plus$ cosec $theta equals$ n, then $n left parenthesis m plus 1 right parenthesis left parenthesis m minus 1 right parenthesis equals$

m
n
2m
2n

The correct answer is: 2m

$A open parentheses a c o s theta blank comma blank a s i n theta close parentheses semicolon B left parenthesis a c o s phi comma blank a s i n blank phi right parenthesis$
$A B equals a equals a square root of 2 open parentheses 1 minus c o s left parenthesis theta minus phi right parenthesis close parentheses end root equals 2 a open vertical bar s i n open parentheses fraction numerator theta minus phi over denominator 2 end fraction close parentheses close vertical bar$

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if $square root of fraction numerator 1 minus sin space A over denominator 1 plus sin space A end fraction end root equals$ sec A-tan A then lies in the quadrants

if $square root of fraction numerator 1 minus sin space A over denominator 1 plus sin space A end fraction end root equals$ sec A-tan A then lies in the quadrants

cosec $straight A equals 4 straight p plus fraction numerator 1 over denominator 16 straight p end fraction not stretchy rightwards double arrow$ cosec A +cot A=

cosec $straight A equals 4 straight p plus fraction numerator 1 over denominator 16 straight p end fraction not stretchy rightwards double arrow$ cosec A +cot A=

The total amount of fee collection for 21 students is $31500. How much was paid by each student.

The total amount of fee collection for 21 students is $31500. How much was paid by each student.

parallel

is a

is a

Chemistry-General

In the reaction,

In the reaction,

Chemistry-General

In the given action,

the product [X] will be:

In the given action,

the product [X] will be:

Chemistry-General

parallel

In the reaction sequence,

In the reaction sequence,

Chemistry-General

In the given reaction,

In the given reaction,

Chemistry-General

In the given reaction sequence,

the final product [BJ will be:

In the given reaction sequence,

the final product [BJ will be:

Chemistry-General

parallel

Arrange the following compounds in the decreasing order of reactivity for hydrolysis reaction:
1) $C subscript 6 end subscript H subscript 5 end subscript C O C l$
2)
3)
4)

Arrange the following compounds in the decreasing order of reactivity for hydrolysis reaction:
1) $C subscript 6 end subscript H subscript 5 end subscript C O C l$
2)
3)
4)

Chemistry-General

The product obtained in above reaction will be :

The product obtained in above reaction will be :

Chemistry-General

The percentage of nitrogen in urea is:

The percentage of nitrogen in urea is:

Chemistry-General

parallel

In a packet of 40 pens, 12 are red. So, what % age are red pens?

In a packet of 40 pens, 12 are red. So, what % age are red pens?

Consider the following compounds, which of these will release CO₂ with 5% NaHCO₃ ?
i)
ii)
iii)

Consider the following compounds, which of these will release CO₂ with 5% NaHCO₃ ?
i)
ii)
iii)

Chemistry-General

Identify the product' Y' in the following reaction sequence:

Identify the product' Y' in the following reaction sequence:

Chemistry-General

parallel

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