Answer:
Q3. Last option Q4. 3rd option
Step-by-step explanation:
s^2 = 9.8^2+5.1^2-2(9.8)(5.1)cos39
s^2=44.366489...
s=6.7
Cosine means complementary sine, the sine of an angle and the cosine of the complementary angle are the same.
sin 75° = cos θ
cos (90° - 75°) = cos θ
cos 15° = cos θ
In general when we have
cos x = cos a
the solution is
x = ±a + 360°k, integer k
Here they just went with x=a, or
θ = 15°
Answer: C θ = 15°
3 Hours and 30 minutes
50+50+50 is 3 hours
then you have 25 minutes which is half an hour.
3 Hours and 30 minutes is your answer
10 is the answer for this question hope i helped
4/3 x 84.78 but i am not sure hope you get it right :) <3