If A is in the fourth quadrant and cos A = 5/13 find the value of
13 sin A+5 sec A divided by 5 tan A + 6cosec A
As in fourth quadrant cos is positive .
So cosA =
So sinA = (1- cos2A)1/2 =
But in fourth quadrant sin is negative , so we will take -12/13
And secA = 13/5
tanA = sinA/cosA = -12/5
cosecA = 1/sinA = -13/12
Hence
So cosA =
So sinA = (1- cos2A)1/2 =
But in fourth quadrant sin is negative , so we will take -12/13
And secA = 13/5
tanA = sinA/cosA = -12/5
cosecA = 1/sinA = -13/12
Hence