Answer:
sina
Step-by-step explanation:
Using the cofunction identity
cos(90 - x) = sinx , then
cos(120 - (30 + a) )
= cos(120 - 30 - a)
= cos(90 - a)
= sina
The vertical of x is 100 degrees meaning the opposite will be 80 degrees because they always add up to 180 degrees.
Answer:
the third one on the first picture it skips 18 and messes up the +1
Answer:
30 and 60
Step-by-step explanation:
Complementary angles add up to 90o
x+2x=90
3x=90
x=30
2*30=60
30+60=90
