Please help with all steps What is the value of the red angle, if the white angle is theta - Maths - Vector Algebra

Question

Please help with all steps What is the value of the red angle, if
the white angle is theta?

Subham Kumar Singh · Accepted Answer

Dear Student ,
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5f1c2e85247b5%20jpg"
style="width: 1022px; height: 827px;">
Regards

Please help with all steps. What is the value of the red angle, if the white angle is theta?