Answer:
x = 7
Step-by-step explanation:
x + 7 = 14
Subtract 7 from both sides
x = 14 - 7 = 7
Are you trying to find a?
Step-by-step explanation:
12x-5=91°
12x=91+5
x =<u>9</u><u>6</u>
<u> </u><u> </u><u> </u><u> </u><u> </u>12
x=8°
hope it helps.
Answer:
see below
Step-by-step explanation:
cos ( x+pi/2) = -sinx
We know that
cos(A + B) = cos A cos B - sin A sin B
Let x = A and pi/2 = B
cos x cos pi/2 - sin x sin pi/2 = -sin x
We know cos pi/2 = 0 and sin pi/2 = 1
cos x * 0 - sin x *1 = -sin x
- sin x = - sin x
