Question

evaluate the trignometic eq: 7/2 cos⁡70/sin⁡20 -4/7 cos⁡〖35 cosec⁡37 〗/tan⁡〖15 tan⁡〖35 tan⁡〖55 tan⁡75 〗 〗 〗

Answer 1

Answer:

(Cos70 / sin20 )+ ((cos55 cosec35 )/ (tan5 tan25 tan45 tan65 tan85))

=(cos(90-20) /sin20)+(cos55 cosec35)/(tan5 tan25 tan45 tan(90-25) tan(90-5))

= (sin20/ sin20) + (cos55 cosec35)/ (tan5 tan25 tan45 cot25 cot5)

= 1+ (cos55 cosec35)/(1)

= 1+ (cos55/sin35)

= 1+(sin(90-35)/sin35)

= 1+(sin35/sin35)

= 1+1

= 2

Answer 2

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