công thức lượng giác

công thức lượng giác

11th Grade

10 Qs

quiz-placeholder

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Assessment

Quiz

Mathematics

11th Grade

Hard

Created by

Hanamzuki Skylar

Used 45+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

sin(a+b)=?

sina.sinb + cosa.cosb

sina.cosb + cosa.sinb

sina.cosb - cosa.sinb

sina.sinb - cosa.cosb

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

cos(a-b)=?

cosa.sinb - sina.cosb

cosa.sinb - sina.cosb

cosa.cosb + sina.sinb

cosa.sinb + sina.cosb

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2sina.cosa=

sin2a

cos2a

tan2a

cot2a

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

cos2a=?

2sin2a-1

1-2cos2a

1-sin2a

cos2a-sin2a

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

cos a +cosb=?

2cos a+b2\frac{a+b}{2} cos ab2\frac{a-b}{2}

2sin \frac{a+b}{2} cos \frac{a-b}{2}

2cos \frac{a+b}{2} sin \frac{a-b}{2}

2sin \frac{a+b}{2} sin \frac{a-b}{2}

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 12\frac{1}{2}  (sin(a+b)+sin(a-b))=?

sina.sinb

cosa.sinb

sina.cosb

cosa.cosb

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

sina + cos a =?

2\sqrt{2} sin( x - π4\frac{\pi}{4} )

\sqrt{2} sin( x + \frac{\pi}{4} )

\sqrt{2} cos( x - \frac{\pi}{4} )

\sqrt{2} cos( x + \frac{\pi}{4} )

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