Questions by Tksfz

Questions by Tksfz

Cos2A+cos2B+cos2C =–1–4cosAcosBcosC

asked Mar 2, 2021

1 answer

5 votes

174k views

How is the musician shown changing the instrument to play different musical notes? A.)changing the velocity of the sound wave B.)changing the resonant frequency of the standing wave C.) changing the amplitude

asked Oct 27, 2020

2 answers

4 votes

160k views

There are 150 students and 3/5 of these students are girls. 2/3 play school activities. how many play activities?

asked May 23, 2020

2 answers

4 votes

61.6k views

Which postulate can be used to prove that the triangles are congruent? A. SSS B. AAA C. AAS D. ASA

asked Jan 23, 2020

1 answer

3 votes

122k views

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