Question

if the cos×cos30+sin60×sin30.=cos30​

Answer 1

Explanation:

Given

cos xcos 30+sin60×sin30=cos30

cos( A-B)= cosA.cosB+sinA.sinB

cos(60-30)=cos30

and hence x value is 60

Answer 2

good morning bhaiya ji

ans

cosx=cos60

∘

cos30

∘

+sin60

∘

sin30

∘

cosx=cos(60

∘

−30

∘

)

cosx=cos30

∘

x=30

∘