Question

What is the approximate value of $(\sin {17}^o{)}^2+(\cos {17}^o{)}^2$ ?

• A. 0.03
• B. 0.18
• C. 0.72
• D. 1
• E. 1.27

Answer 1

Answer: (D)

1

We know that ${\sin }^2\theta +{\cos }^2\theta =1$ is true for all values of $\theta$.

So, here $\theta$ is ${17}^o$.
Therefore, ${\sin }^{2}17+{\cos }^{2}17=1$