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Firdavs [7]
3 years ago
14

Ummmmm i need to get 5 brainliest

Mathematics
1 answer:
Lelu [443]3 years ago
3 0
Answer my questions I gotchu
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Verify this cofunction identity by using the difference identity for cosine. Show your work! cos⁡(π/2-θ)=sinθ
taurus [48]
Cos(A-B) = cosAcosB + sinAsinB
<span>
cos(</span>π/2 - θ) = cos(π/2)cosθ + sin(π/2)sinθ

π/2 = 90°
cos(π/2) = cos90° = 0.        sin(π/2) = sin90° = 1

cos(π/2 - θ) = cos(π/2)cosθ + sin(π/2)sin<span>θ
</span>
                   = 0*cosθ + 1*sin<span>θ  = </span>sin<span>θ

Therefore  </span>cos(π/2 - θ) = sin<span>θ
 
QED   </span>
8 0
3 years ago
I need help with geometry
andrew-mc [135]
What do you need help with?
8 0
3 years ago
Read 2 more answers
What is 5/16 expressed as a percent? Enter your answer in the box.
Paraphin [41]

5/16 as a decimals.  Divide 5 by 16 = 0.3125 times 100 = 31.25%


8 0
3 years ago
Read 2 more answers
Can anyone explain how this problem is done ?
Svetach [21]

B

Step-by-step explanation:

6 0
3 years ago
How many unique planes can be determined by four noncoplanar points?
marta [7]

Answer:

Four unique planes

Step-by-step explanation:

Given that the points are non co-planar, triangular planes can be formed by the joining of three points

The points will therefore appear to be at the corners of a triangular pyramid or tetrahedron such that together the four points will form a three dimensional figure bounded by triangular planes

The number of triangular planes that can therefore be formed is given by the combination of four objects taking three at a time as follows;

₄C₃ = 4!/(3!×(4-3)! = 4

Which gives four possible unique planes.

3 0
3 years ago
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