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Questions and Answers
What is the expansion of $(a + b)^2$?
What is the expansion of $(a + b)^2$?
- $a^2 + b^2$
- $a^2 + 2ab - b^2$
- $a^2 - 2ab + b^2$
- $a^2 + 2ab + b^2$ (correct)
In a right-angled triangle, which trigonometric ratio represents the ratio of the opposite side to the hypotenuse?
In a right-angled triangle, which trigonometric ratio represents the ratio of the opposite side to the hypotenuse?
- Tangent
- Cosine
- Cosecant
- Sine (correct)
What is the value of $cos(60^ ext{o})$?
What is the value of $cos(60^ ext{o})$?
- $\frac{1}{\sqrt{2}}$
- $\frac{\sqrt{3}}{2}$ (correct)
- $\frac{\sqrt{2}}{2}$
- $\frac{1}{2}$
