[cos-1(cos(10)=?" Find "],[" value "]

If y=cos^(-1)(cos4) then find the value of y

Find the values of cos 22(1/2)^(@) using the value of cos 45°?

If (1+cos A) (1-cos A) = 3/4 , find the value of sec A.

If (1+cos ) (1 - cos A ) = 3/4 , find the value of sec A.

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^(@)

If (cos6x+6cos4x+15cos2x+10)/(cos5x+5cos3x+10cosx)=1 , then find the smallest positive value of x.

If (cos6x+6cos4x+15cos2x+10)/(cos5x+5cos3x+10cosx)=1 , then find the smallest positive value of x.

If cos ecA=2 then find the value of (1)/(tan A)+(sin A)/(1+cos A)

If cos ec A=2, find the value of (1)/(tan A)+(sin A)/(1+cos A)

The value of cos^(2)10^(@)-cos10^(@)cos 50^(@)+cos^(2)50^(@) is k/2 . The value of k is ________.