Home
Class 11
MATHS
If x=cos10^@cos20^@cos40^@, then the val...

If `x=cos10^@cos20^@cos40^@`, then the value of x is

A

`1/4tan10^@`

B

`1/8cot10^@`

C

`1/8cosec10^@`

D

`1/8sec10^@`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

If x= cos 10^(@)cos 20^(@) cos 40^(@), then the value of x is.............. A) 1/4 tan 10^(@) B) 1/8 cos 10^(@) C) 1/8 cosec 10^(@) D) 1/8 sec 10^(@)

cos20^@cos40^@cos80^@=

If 5(tan^2x - cos^2x)=2cos 2x + 9 , then the value of cos4x is

If cos x+ cos ^(2) x=1,. then the value of sin ^(2) x+ sin ^(4) x is

Let cos(2 tan^(-1) x)=1/2 then the value of x is

If {:(f(x),=(cos x - sin x)/(cos 2x),",", x != (pi)/4),(,=k, ",", x = (pi)/4):} is continous at x = (pi)/4 , then the value of k is

If sinx+sin^2x=1 , then find the value of cos^(12)x +3cos^(10)x + 3 cos^8x + cos^6x-1

Let f(x) = |{:(secx,cosx,sec^(2)x+cotx cosecx),(cos^(2)x,cos^(2)x,cosec^(2)x),(1,cos^(2)x,cos^(2)x):}| then find the value of int_(0)^(pi//2) f(x) dx.

The value of cos20^@cos40^@cos60^@cos80^@ is equal to