If $\frac{cotA}{√(1 + cot^{2}A)} = x$, then the value of x is
1). sinA
2). cosecA
3). secA
4). cosA
1. If a2 + b2 = 121 and ab = 52, then value of \(\frac{{a + b}}{{a - b}}\) is –
5. The 5th and 9th term of an arithmetic progression are 7 and 13 respectively. What is the 15th term?
6. What is the unit digit of (124744 + 125524 + 127864)?
7. If a3 + b3 = 72 and ab = 8, then what is the value of a + b?