Question

prove that
sin420°cos390°+cos(-300°)sin(-330°)=1​

Answer 1

Please refer to this answer.

Above answer is wrong .

The reasons are given along the answer.

Please mark it as brainliest answer. So that no one get confused.

please refer to this answer.

I also searched it on google and answer is 1/2.

Hope u will refer to my answer deeply.