Question

0
sin 45° sin 30° + cos 45º cos 30°​

Answer 1

Question

↗sin 45° . sin 35° + cos 45° . cos 30°

Solution

=> Firstly we have to find out the value of sin and cos at the given angle 45° and 30°

sin 45 ° = 1/√2

sin 30°. = 1/2

cos 45° = 1/√2

cos 30°. = √3/2

Now we have to put the value of these angles.

=> 1/√2(1/2) + 1/√2(√3/2)

=> 1/2√2 + √3/2√2

=> 1 + √3/2√2

Hope it helps

Answer 2

Answer:

root 2 + root 6 /  4

Step-by-step explanation:

this is in the form of Sin A Sin B + Cos A Cos B

so cos ( A - B )

= cos ( 45-30 )

= cos 15

= root 2 + root 6 / 4