Answer:
https://studyandanswers.com/mathematics/question513006172
Step-by-step explanation:
hope found the answer
Answer: (2α) = cos²(α) - sin²(α)
Step-by-step explanation:
The expression for cosine of the sum of two angles is:
cos (α + β) = cos(α)*cos(β) - sin(α)*sin(β)
in case α = β
cos ( α + α ) = cos (2α) = cos(α)*cos(α) - sin(α)*cos(α)
Hence cos (2α) = cos²(α) - sin²(α)
Answer:
Step-by-step explanation:
Four triangles. Each area is bh/2.
So 8x ÷2 or 4x Multiply by 4 (small triangles) to get 16x.
48 ÷ 16 =3 so x = 3
1. 50
2. 5
3. 0.5
4. 0.05
5. 0.005
I hope you see the pattern here . When multiplying the exponent (the small number near the 10) determines the number of zeros to the RIGHT . When dividing the number determines how many zeros to the LEFT usually resulting in a decimal. This is called scientific notation.
Hope this helps!:)
