Question

ls it right to say cos(60°+30°)=cos60° cos30°-sin60° sin30°​

Answer 1

Answer:

yes, cos(A+B)=cosAcosB-sinAsinB

Step-by-step explanation:

cos90=1/2.√3/2-√3/2.1/2

0=√3/4-√3/4

0=0

Hope it helps..Please mark me as the brainliest..^_^

Answer 2

cos60+sin30=90

sin60+cos30=90

90-30=90-30

1=1

1ans