C-09-Q110mediumsingle_mcq

If $\operatorname{cosec} A - \cot A = x$ and $\operatorname{cosec} A + \cot A = y$ , then $xy = ?$

a $0$
b $1$
c $-1$
d $2$

ব্যাখ্যা

The identity $\operatorname{cosec}^2 A-\cot^2 A=1$ means $xy=(\operatorname{cosec} A-\cot A)(\operatorname{cosec} A+\cot A)=\operatorname{cosec}^2 A-\cot^2 A=1$ .

এই অধ্যায়ের আরও প্রশ্ন

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C-09-Q120

Trigonometric Ratio — সব প্রশ্ন দেখুন (217টি) →

If $\operatorname{cosec} A - \cot A = x$ and $\operatorname{cosec} A + \cot A = y$ , then $xy = ?$

0

1

-1

2

ব্যাখ্যা

The identity $\operatorname{cosec}^2 A-\cot^2 A=1$ means $xy=(\operatorname{cosec} A-\cot A)(\operatorname{cosec} A+\cot A)=\operatorname{cosec}^2 A-\cot^2 A=1$ .

If cosec⁡A−cot⁡A=x\operatorname{cosec} A - \cot A = xcosecA−cotA=x and cosec⁡A+cot⁡A=y\operatorname{cosec} A + \cot A = ycosecA+cotA=y, then xy=?xy = ?xy=?

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

If cosec⁡A−cot⁡A=x\operatorname{cosec} A - \cot A = xcosecA−cotA=x and cosec⁡A+cot⁡A=y\operatorname{cosec} A + \cot A = ycosecA+cotA=y, then xy=?xy = ?xy=?

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

If $\operatorname{cosec} A - \cot A = x$ and $\operatorname{cosec} A + \cot A = y$ , then $xy = ?$

If $\operatorname{cosec} A - \cot A = x$ and $\operatorname{cosec} A + \cot A = y$ , then $xy = ?$