Math, asked by bm627166, 3 months ago

cos pi/5 + cos 4pi/5

Answers

Answered by neetutiwari2222

Answer❀✿°᭄

cos(π/5)cos(2π/5)cos(4π/5)cos(8π/5)=

2

4 sin(π/5)

1 sin

5

2

4 π

=−

16

1 [∵sin

5 16π

=sin(3π+

5 π

)=−sin

5 π

]

Previous Question

Next Question

Similar questions

Science, 1 month ago

What are multicellular organisms.breif explanation.

History, 1 month ago

$\huge{\underline{\mathtt{\red{q}\pink{u}\green{e}\blue{s}\purple{}\orange{}}}} \bold \red♡ \\ \huge{ \mathtt{ \pink{what} \blue{was}{jacobins} \red{club} }}$ ...

Physics, 1 month ago

The speed - time graph of a car is given here. Using the data in the graph calculate the total distance covered by the car. A.) 1250 m B.) 875 m C.) 1500 m D.) 870 m...

English, 3 months ago

choose the correct preposition it is written ______the end (at, of) ...

Math, 3 months ago

-20=m+5 do the solution...

Computer Science, 9 months ago

Why the web page creating language (HTML) named hypertext? Select one: a. Because HTML contains hyperlinks in it b. Because someone who creates web page is excessively tensed c. Because it emphasis non-linear nature of linking among pages...

Biology, 9 months ago

Match column I with column II and select the correct option form the codes given below. Column I(Plasma protein)Column II(Functions)A.Fibrinogen(i)Defence mechanismB.Globulins(ii)Osmotic balanceC.Albumins(iii)Coagulation of blood...

Biology, 9 months ago

Amphistomatic leaf with stomata distributed equally on both the surface is an example of...

cos pi/5 + cos 4pi/5 ​