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Answer:
90
Step-by-step explanation:
but I can't give the explanation sorry
Answer:
b)30°
Step-by-step explanation:
cos^2ø+sin^2ø=1
cos^2ø=1-sin^2ø --eq-(1)
here
cos^2ø=3-(9/4)
=12-9/(4)
=3/4
from eq1
1-sin^2ø=3/4
sin^2ø=1-(3/4)
sin^2ø=4-3/(4)
sin^2ø=1/4
sinø=√[1/4]
sinø=1/2
ø=sin-¹(1/2)
ø=30°. {sin30°=1/2}
hope u understand
if you don't understand then reply me I will explain you better than this clearly.