Question

sin( 30 -A) cos ( 60 + A) + sin( 30 + A) (sin 60 + A) = 1​

Answer 1

Step-by-step explanation:

=please mark me at brainlist please

Answer 2

Step-by-step explanation:

Here,

(1/2 cos A - √3 /2 sin A) ( 1/2 cosA - √3/2 sin A) + ( √3/2 cosA + 1/2 sin A ) ( √3 /2 cos A + 1/2 sin A)

= (cosA - √3sinA)/2}² + ( √3 cosA + sinA)/2}²

=( 1 + 3cos²A + 3sin²A)/4

= (1 + 3)/4

= 4/4

= 1 RHS proved