" i) "(sin36^(@))/(cos54^(@))-(sin54^(@))/(cos36^(@))

Evalute (f) (sin36^(@))/(cos54^(@))-(sin54^(@))/(cos36^(@))

Evaluate the following: (i) (cos37^(@))/(sin53^(@))(ii)(sin41^(@))/(cos49^(@))(iii)(tan54^(@))/(cot36^(@))

Prove that (sin36^(@))/(cos54^(@))+(cos36^(@))/(sin54^(@))=2

Evaluate the following: (i) sin39^0-cos51^0 (ii) cos e c25^0-sec65^0 +cot34^0-tan56^0 (iii) (sin36^0)/(cos54^0)-(sin54^0)/(cos36^0) +cos^2 13^0-sin^2 77^0

Evaluate the following: sin39^0-cos51^0 (ii) cos e c25^0-sec65^0 cot34^0-tan56^0 (iv) (sin36^0)/(cos54^0)-(sin54^0)/(cos36^0) cos^2 13^0-sin^2 77^0

sin9^(@)+cos9^(@)=sqrt(2)sin54^(@)

cos54^(@)cos36^(@)-sin54^(@)sin36^(@)=0

Prove that (sin36^(@)+cos36^(@))/(cos54^(@)+sin54^(@))=1

Without using Trigonometric Tables evaluate the following :- 3((sin36^@)/(cos54^@))^2 -2((tan18^@)/cot72^@)^3+2tan13^@tan21^@tan69^@tan77^@ .

sin36^(@)+cos36^(@)=sqrt(2)cos9^(@)