Question

if a=45 ,verify that (i) sin 2a = sin a cos a​

Answer 1

Answer:

Step-by-step explanation:

a=45

.: Sin2a = Sin2(45)

.:Sin2a = Sin90

Sina = Sin45

Cosa= Cos45

Sin90= Sin45(Cos45)

1 = 2(sin^2 45)

1=2(1/2)

1= 1

Hence,proved

Answer 2

=> Sin 2(45) = 2(Sin 45 × Cos 45)

=> Sin 90 = 2 (1/√2 × 1/√2)

=> 1 = 2(1/2)

=> 1 = 1