Question

find the exact value of cos(A+B), A=90(degrees) B=60(degrees)

Answer 1

@him1618 do you know what to do? do i just add both a and b?thanks in advance

Answer 2

just add a and b and put them inside the cos

Answer 3

so on my calculator i put in cos(150)?

Answer 4

yes

Answer 5

i got a decimal, and it asks for the exact value

Answer 6

that is the value

Answer 7

nevermind i found out, theres a formula

Answer 8

thanks for the effort