Yes it is true:
(1 - cos^2 x) = sin^2 x Sqr.(1 - cos^2 x) = sin x and (-sinx) True, since sin x negative. Also, x terminates in quadrant 3 and 4. Hope this is helpful
Answer:
The answr is 102 degrees. Here's why
Step-by-step explanation:
The square means the angle is 90 degrees. Therefore, for the big triangle, we already know 2 of the degrees, 50 and 90. A triangle's degrees add up to 180. 50+90=140. 180-140=40. This means the top angle is 40. Now finding X is easy, because we already know the other 2 points in the triangle, which are 38 and 40. Add those up, you get 78. 180-78=102, your answer. The triangle is 102 degrees.
Answer:
72
Step-by-step explanation:
8/9 + 3/8
Multiply the denominators to get the common denominator
9x8 = 72.
Answer:
To do this, you wold need to know the percent error formula.
Percent Error = (Actual value - Expected Value)/Expected Value x 100
Percent Error = (388 - 400)/400 x 100
P.E = (-12)/400 x 100
-0.03 x 100
-3%
(It could possibly positive, if they don't take negative)
Hope this helps!
