Answer:
<em>A) The reference angle should be </em><u><em>,</em></u><em> and the sign of the value should be </em><u><em>negative.</em></u>
Step-by-step explanation:
cos()
Remove full rotations of 2π until the angle is between 0 and 2.
cos()
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant.
-cos()
The exact value of cos() is .
−
Answer:
4
Step-by-step explanation:
the third angle of the inner triangle is defined by using the rule that the sum of all angles in a triangle must be 180 degrees. let's call this angle a
180 = 48 + 16x + a
132 - 16x = a
and then we know that both angles, 28x and a together must also be 180, as they are complementing each other to cover the whole top of the base line.
so,
28x + 132 - 16x = 180
12x = 48
x = 4
Answer:
A(1) = -5
A(4) = -135
A(8) = -10935
Step-by-step explanation:
A(n) = -5 *3^(n − 1)
We want the first term
A(1) = -5 *3^(1 − 1)
= -5* 3^0
= -5 (1)
= -5
We want the fourth term
A(4) = -5 *3^(4 − 1)
= -5* 3^3
= -5 (27)
= -135
We want the eight term
A(8) = -5 *3^(8 − 1)
= -5* 3^7
= -5 (2187)
= -10935
Answer:
x=31°
Step-by-step explanation:
98°+51°+x°=180° (sum of angles in a triangle is 180°)
149°+x°=180°
MAKE x° THE SUBJECT OF FORMULA
x°=180-149
x=31°