Question

sin? A cos? B + cos? A sinB +
cos? A cos2 B + sin? A sin? B = 1​

Answer 1

Answer:

sin A cos B+cos A sin B=sin(A+B)

cos A cos B+sin A sin B=cos(A-B)

sin(A+B)=cos(A-B)

sin/cos=(A-B)/(A+B)

tan=(A-B)/(A+B)

Step-by-step explanation:

Hope u may get any idea...