`(cos2 0^@-sin2 0^@)/(cos2 0^@+sin20^@)=tan25^@`

Show that (cos2^@-sin2^@)/(cos2^@+sin2^@)=tan43^@

(cos20^(@)-sin20^(@))/(cos20^(@)+sin20^(@))=tan25^(@)

Prove that :(cos20^(@)-sin20^(@))/(cos20^(@)+sin20^(@))=tan25^(@)

Prove that (cos20^(@)-sin20^(@))/(cos20^(@)+sin20^(@))=tan 25^(@)

prove that (cos20-sin20)/(cos20+sin20)=tan25

Prove that : (cos 20^0 - sin 20^0)/(cos 20^0 + sin 20^0) = tan 25^0

Prove that : (cos 10^0 - sin 10^0)/(cos 10^0 + sin 10^0) = tan 35^0

Evaluate : tan^2 30^@ sin^2 30^@ + cos 60^@ sin^2 90^@tan^2 60^@-2 tan 45^@ cos^2 0^@ sin 90^@

cos4 0^(@)+cos2 0^(@))=3(cos1 0^(@)+sin2 0^(@)) 40 CUSOUcos 40^@ + cos 20O 4(cos310^@ + sin320^@) = 3(cos 10^@ + sin20^@)N3.1 = 4

Prove that (cos10^0+sin10^0)/(cos10^0-sin 10^0)=tan55^0