Question

Without using trigonometric tables evaluate,
7/2 cos70*/sin20* + 3/2 cos55*cosec35*/tan5*tan 25*tan 45*tan85*tan65*

Answer 1

7/2 cos70/sin(90-70) + 3/2 cos55 cosec(90-55) / tan5 tan(90-65) tan45 tan(90-5) tan65
7/2 cos70/cos70 + 3/2 cos55 sec55/tan5*cot5*tan65*cot65*tan45 ( tan 45 = 1)
7/2+3/2/1*1
10/2 = 5

Answer 2

Answer:

7/2 cos70/sin(90-70) + 3/2 cos55 cosec(90-55) / tan 5 tan(90-65) tan 45 tan(90-5) tan65

7/2 cos 70/ cos 70 + 3/2 cos 55 sec 55/tan 5*cot 5*tan65*cot 65*tan 45 ( tan 45 = 1)

7/2+3/2/1*1

10/2 = 5