Question

Value of ${[\frac{\sin {49}^o}{\cos {41}^o}+\frac{\cos {41}^o}{\sin {49}^o}]}^2$ is

• A. $2$
• B. $4$
• C. $1$
• D. None of these

Answer 1

The correct option is B $4$

${[\frac{\sin {49}^o}{\cos ({90}^o-{49}^o)}+\frac{\cos {41}^o}{\cos ({90}^o-{41}^o)}]}^2$
${[1+1]}^2=4$