Question

Cos 15*Cos 15/2 * Sin 15/2​

Answer 1

Answer:

1/8

Step-by-step explanation:

FIRST OF ALL U MUST KNOW ABOUT A FORMULA:--

2.Sin(x).Cos(x)=Sin(2x)

Cos(15)*Cos(15/2)*Sin(15/2)

Cos(15)*[2.Cos(15/2)*Sin(15/2)]/2

Cos(15)*Sin(2*15/2)/2

Cos(15)*Sin(15)/2

[2.Cos(15).Sin(15)]/2*2

Sin(15*2)/4

Sin(30)/4

1/2*4 [Sin(30°)=1/2]

1/8

Hope you understood

Answer 2

Answer:

Step-by-step explanation:

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