Question

cos 11+ sin11/cos11-sin 11=tan56​

Answer 1

Answer:

ok

Step-by-step explanation:

cos11

∘

+sin11

=

cos11

∘

(1−tan11

∘

)

cos11

∘

(1+tan11

∘

)

=

1−tan45

∘

tan11

∘

tan45

∘

+tan11

∘

as (tan45

∘

=1)

=tan(45

∘

+11

∘

)

=tan56

∘

LHS=RHS

Hence proof