Question

Find the value of (cos 15°)​

Answer 1

Answer:

HI MATE.

The exact value of cos (15°) is √(2 + √(3)) / 2.

( Cos 15 ) :

We know that

cos (a-b) = cos a * cos b + sin a *sin b

cos 15 = cos (45–30)

=> cos 15 = cos 45 * cos 30 + sin 45 * sin 30

=> cos 15 = (1/√2)* (√3/2) + (1/√2)*(1/2)

=> cos 15 = (√3 + 1 )/2√2.

Hope it helps you mate.

please thank and mark my answer as brainliest.

humble request....

@ ANUSHA ❤✌

Answer 2

Hey mate this is your answer

Give ❤️