Question

if B=30°
Pove that :-
Sin2b=2 sin Bx cosB​

Answer 1

Answer:

when 2B=60°

then sin2b=sin60°=root3/2

so rhs=2×sin30×cos30

Answer 2

Step-by-step explanation:

B=30°

SIN 2B =2×sinB × cos B

sin 2×30°= 2×sin×30° × COS 30°

sin60°=2×sin30°×cos30°

√3/2=2×1/2 × √3/2

√3/2 =√3/2