If cos x= -1/2 and x lies in quadrant II. What is the value of tan x?
-1/√3
1/√3
√3
-√3
If sin x = √53 and x lies in IInd quadrant, find the values of cos x2, and sin x2 and tan x2.
Find the value of the expression cos4π8+cos43π8+cos45π8+cos47π8
Or
Find the value of sinx2, cos x2 and tan x2, if sin x=14, where x lies in ssecond quadrant.