Math, asked by shivamprpp2v528, 11 months ago

If cos² theta = 0 then simplify.HELP.
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Answered by amitnrw
0

Answer:

1

Step-by-step explanation:

If cos² theta = 0 then simplify

0             Cosθ      Sinθ

Cosθ       Sinθ         0

Sinθ         0             Cosθ

Squraing the matrix

0 + Cos²θ + Sin²θ           0 + CosθSinθ + 0        0 + 0 + SinθCosθ

0 + SinθCosθ + 0            Cos²θ + Sin²θ + 0        CosθSinθ + 0 + 0

0 + 0 +  CosθSinθ           SinθCosθ + 0 + 0         Sin²θ + 0 + Cos²θ

1                       SinθCosθ       SinθCosθ

SinθCosθ         1                      SinθCosθ  

SinθCosθ        SinθCosθ        1

1st

= 1  *   1                      SinθCosθ     = 1  - Sin²θCos²θ  = 1- 0 = 1

         SinθCosθ        1

2nd

= - SinθCosθ *    SinθCosθ       SinθCosθ = - SinθCosθ (SinθCosθ - 0)

                        SinθCosθ        1

= - Sin²θCos²θ = 0

3rd

SinθCosθ     SinθCosθ       SinθCosθ  =  SinθCosθ (0 - SinθCosθ)

                    1                      SinθCosθ  

= - Sin²θCos²θ = 0

1 - 0 + 1 = 1

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