Math, asked by tiwarihimanshu1678, 10 months ago

Please answer question no. 4

Attachments:

Answers

Answered by sandy1816

1

Step-by-step explanation:

sin7θ+sin4θ+sinθ=0

2sin4θcos3θ+sin4θ=0

sin4θ(2cos3θ+1)=0

sin4θ=0 or 2cos3θ+1=0

4θ=nΠ , n∈Z or cos3θ=-1/2

θ=nΠ/4 or cos3θ=cos(Π-Π/3)

=cos2Π/3

3θ=2nΠ±2Π/3

θ=2nΠ/3±2Π/6

Previous Question

Next Question

Similar questions

Science, 5 months ago

a self-excited shunt generator has a field resistance of 60 ohms. when the generator delivers 6kw, the generated emf is 133v. determine the armature resistance.

Biology, 5 months ago

Which plant and animal diseases are caused by micro-organisms and what are the measures to be taken against them?

History, 5 months ago

Spanish colonial period changes...

Chemistry, 10 months ago

the potential of hydrogen electrode is -118 mV. The H+ concentration concentration of the solution is 1) 0.01M 2) 2M 3) 10-4M 4) IM ...

Math, 10 months ago

Find four consecutive nos, whose middle nos sum is 14.and cubes of first and last nos is 2198...

Geography, 1 year ago

What is resource planning discuss in detail about its various states?

Math, 1 year ago

If one third of one fourth of a number is 15 then what is four tenths of the number...

Math, 1 year ago

To go to the office afridi starts from his house by boarding bus he travels 4/5 th of the journey in the bus 1/8 of the journey by rickshaw and 3 km on foot what is the distance travelled by him...