Free Printable 第三冊第一章(和差角公式)

1.

cos( $\alpha+\beta$ )=？

a)

cosαcosβ+sinαsinβ

b)

cosαcosβ-sinαsinβ

c)

sinαcosβ+cosαsinβ

d)

sinαcosβ-cosαsinβ

2.

cos( $\alpha-\beta$ )=？

a)

cosαcosβ+sinαsinβ

b)

cosαcosβ-sinαsinβ

c)

sinαcosβ+cosαsinβ

d)

sinαcosβ-cosαsinβ

3.

sin( $\alpha-\beta$ )=？

a)

cosαcosβ+sinαsinβ

b)

cosαcosβ-sinαsinβ

c)

sinαcosβ+cosαsinβ

d)

sinαcosβ-cosαsinβ

4.

sin( $\alpha+\beta$ )=？

a)

cosαcosβ+sinαsinβ

b)

cosαcosβ-sinαsinβ

c)

sinαcosβ+cosαsinβ

d)

sinαcosβ-cosαsinβ

5.

cos $80^{\degree}$ cos $20^{\degree}$ $+$ sin $80^{\degree}$ sin $20^{\degree}$ =？

a)

cos $60^{\degree}$

b)

cos $100^{\degree}$

c)

sin $60^{\degree}$

d)

sin $100\degree$

6.

cos $80^{\degree}$ cos $20^{\degree}$ $-$ sin $80^{\degree}$ sin $20^{\degree}$ =？

a)

cos $60^{\degree}$

b)

cos $100^{\degree}$

c)

sin $60^{\degree}$

d)

sin $100\degree$

7.

sin $80^{\degree}$ cos $20^{\degree}$ $-$ cos $80^{\degree}$ sin $20^{\degree}$ =？

a)

cos $60^{\degree}$

b)

cos $100^{\degree}$

c)

sin $60^{\degree}$

d)

sin $100\degree$

8.

sin $80^{\degree}$ cos $20^{\degree}$ $+$ cos $80^{\degree}$ sin $20^{\degree}$ =？

a)

cos $60^{\degree}$

b)

cos $100^{\degree}$

c)

sin $60^{\degree}$

d)

sin $100\degree$

9.

sin $80^{\degree}$ cos $20^{\degree}$ $-$ cos $80^{\degree}$ sin $20^{\degree}$ =？

a)

$\frac{1}{2}$

b)

$\frac{\sqrt[]{3}}{2}$

10.

cos $80^{\degree}$ cos $20^{\degree}$ $+$ sin $80^{\degree}$ sin $20^{\degree}$ =？

a)

$\frac{1}{2}$

b)

$\frac{\sqrt[]{3}}{2}$

第三冊第一章(和差角公式)

Total questions: 10

Worksheet time: 3mins

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