Question

Use sum or difference identify to find an exact value for each trig expression
sin(-30 degrees)
tan(90 degrees)

dont use calc

Answer 1

tan 90 is not defined

Answer 2

sin(-30) is same as -sin 30

Answer 3

Hope that helps

Answer 4

so tan 90 is no solution?

Answer 5

ya you can check wit like this

tan(90)=tan (45+45) apply

tan(A+B) formula

Answer 6

can i do Sin(30-60)
sin 30 cos 60 + cos 30 sin 60

Answer 7

sin 30 cos 60 - cos 30 sin 60

Answer 8

^^you can use that

Answer 9

do take cos 60 from cos 30

Answer 10

nah just plug in the values

Answer 11

@jim_thompson5910