Question

The value of ${\sin }^{2}60^{\circ }+{\cos }^{2}30^{\circ }-{\sin }^{2}45^{\circ }$ is

• A. (a) 1
• B. (b) $\sin 90^{\circ }$
• C. (c) $\frac{1}{2}$
• D. (d) Both (a) and (b)

Answer 1

Answer: (D)

Take the values of trigonometric ratios from the table.