Question

take aA60° and B=30°. write the values of cosA,cosB and cos(A+B)​

Answer 1

Step-by-step explanation:

Given,

A=60° , B=30°

Now,

cos A = cos 60° = 1/2

cos B = cos 30° = √3 / 2

cos (A+B) = cos ( 60+30)°= cos 90° = 0

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Answer 2

Answer:

cosA=1/2,cosB=root3/2, cos(A+B)=0

Step-by-step explanation:

USE COS(A+B) formula for the last one.

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