`co s7 0^(@)+sin4 0^(@)=`

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: cos570^(@)s in510^(0)+sin(-330^(@))cos(-390^(@))=0

If cos56^(0)+cos58^(0)-cos66^(0)-4cos28^(0)-cos29^(@)sin33^(@)=lambda then |2 lambda|=

2sin^(2)(8(1^(0))/(2))+4 cos 16^(0) sin(7(1^(0))/(2)) sin (8(1^(0))/(2))+cos32^(0)=

Write the value of the expression (1-4sin1 0^0sin7 0^0)/(2sin1 0^0)

" The value of "(sin1^(0)+sin3^(0)+sin5^(0)+sin7^(0))/(cos1^(0)*cos2^(0)*sin4^(0))" is "

Prove that sin(-420^0)(c0s390^0)+cos(-660^0)(sin330^0)=-1

Prove that sin(-420^0)(c0s390^0)+cos(-660^0)(sin330^0)=-1

Prove that (cos100sin10^0)/(cos10^0-s in 10^0)=tan55^0