Answer:
Cos 25°=Sin65°=0.9063
Step-by-step explanation:
-Complimentary angles generally refer to the two acute angles of a right triangle.
-The two angles add up to 90º.
Let A and B be the two acute angles. Their trigonometric relationship is such that:
Therefore,
The complementary angle of 25° is 65°
Cos 25°=Sin65°=0.9063
V y are the 2 next leters
<em>429 cm²</em>
- Step-by-step explanation:
<em>A(blue) =</em>
<em>= 2×6cm×10cm + 2×6cm×8cm + 8cm×10cm + (8cm×10cm - 5cm×4cm)</em>
<em>= 120cm² + 96cm² + 80cm² + 60cm²</em>
<em>= 356 cm²</em>
<em>A(green) =</em>
<em>= 4cm×5cm + 2×5cm×5cm/2 + 4cm×7cm</em>
<em>= 20cm² + 25cm² + 28cm²</em>
<em>= 73 cm²</em>
<em>A(total) =</em>
<em>= A(blue) + A(green)</em>
<em>= 356 cm² + 73 cm²</em>
<em>= 429 cm²</em>
Answer:
20:10 10 hours
Step-by-step explanation:
10:5 * 2 = 20:10 or 10:5 / 5 : 2:1 * 20 = 20:10
