Suppose that  sinθ=1/  √10  and  <90°<θ 180° .Find the exact values of  cos θ/2  and  tan θ/2 .

Find the exact value of cosu+v given sinu=1213, where 0u2 and cosv=35, where 2v.

A point that moves on a coordinate line is in simple when its distance d from the origin at time t is given by either d=asintord=acost.

Use the conditions tanx=13 and cosx0 to find the values of all six trigonometric functions.