Quiz about Math identities B

Question 1

$$εφ2α=$$

Accepted Answer

$$\frac{2εφα}{1-εφ^2α}$$

Answer

$$\frac{εφα}{1-εφ^2α}$$

Answer

$$\frac{εφα}{1-2εφ^2α}$$

Answer

$$\frac{2εφα}{1+εφ^2α}$$

Question 2

$$σφ2α=$$

Accepted Answer

$$\frac{σφ^2α-1}{2σφα}$$

Answer

$$\frac{σφ^2α+1}{2σφα}$$

Answer

$$\frac{σφα}{1-2σφ^2α}$$

Answer

$$\frac{2σφα}{1+σφ^2α}$$

Question 3

$$ημ2α=$$

Accepted Answer

$$\frac{2εφα}{1+εφ^2α}$$

Answer

$$\frac{1-εφ^2α}{1+εφ^2α}$$

Answer

$$\frac{2εφα}{1-εφ^2α}$$

Answer

$$\frac{εφα}{1+εφ^2α}$$

Question 4

$$συν2α=$$

Accepted Answer

$$\frac{1-εφ^2α}{1+εφ^2α}$$

Answer

$$\frac{2εφα}{1+εφ^2α}$$

Answer

$$\frac{2εφα}{1-εφ^2α}$$

Answer

$$\frac{εφα}{1+εφ^2α}$$

Question 5

$$ημ^2α=$$

Accepted Answer

$$\frac{1-συν2α}{2}$$

Answer

$$\frac{1+συνα}{2}$$

Answer

$$\frac{1-συν2α}{1+συν2α}$$

Answer

$$\frac{1+συν2α}{1-συν2α}$$

Question 6

$$συν^2α=$$

Accepted Answer

$$\frac{1+συν2α}{2}$$

Answer

$$\frac{1+συνα}{2}$$

Answer

$$\frac{1-συν2α}{1+συν2α}$$

Answer

$$\frac{1+συν2α}{1-συν2α}$$

Question 7

$$εφ^2α=$$

Accepted Answer

$$\frac{1-συν2α}{1+συν2α}$$

Answer

$$\frac{1+συν2α}{2}$$

Answer

$$\frac{1+συνα}{2}$$

Answer

$$\frac{1+συν2α}{1-συν2α}$$

Question 8

$$β^2+γ^2-2βγσυνΑ=$$

Accepted Answer

$$α^2$$

Answer

$$β^2$$

Answer

$$γ^2$$

Answer

$$2α$$

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