If sin ⁡ α + cos ⁡ α = 1.2, then what is sin ⁡ α + cos ⁡ α = 1.2?know is that sin 3 ⁡ a + cos 3 ⁡ a is equal to ( sin ⁡ a + cos ⁡ a ) ( sin 2 ⁡ a − sin ⁡ a cos ⁡ a + cos 2 ⁡ a ) = 6 5 ( sin 2 ⁡ a − sin ⁡ a cos ⁡ a + cos 2 ⁡ a )

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If   sin  ⁡  α  +  cos  ⁡  α  =  1.2, then what is   sin  ⁡  α  +  cos  ⁡  α  =  1.2?know is that       sin          3        ⁡  a  +      cos          3        ⁡  a is equal to  (  sin  ⁡  a  +  cos  ⁡  a  )  (      sin          2        ⁡  a  −  sin  ⁡  a  cos  ⁡  a  +      cos          2        ⁡  a  )  =            6      5        (      sin          2        ⁡  a  −  sin  ⁡  a  cos  ⁡  a  +      cos          2        ⁡  a  )

Myla Pierce · Accepted Answer

Hint:      (    sin    ⁡    a    +    cos    ⁡    a    )        (          sin              2              ⁡    a    −    sin    ⁡    a    cos    ⁡    a    +          cos              2              ⁡    a    )    =    =      (    sin    ⁡    a    +    cos    ⁡    a    )        (                            (          sin          ⁡          a          +          cos          ⁡          a          )                            2              −          3      2              (                                    (            sin            ⁡                          a                        +            cos            ⁡                          a                        )                                    2                    −      1      )        )

Poftethef9t · Accepted Answer

Hint: if   sin  ⁡  α  +  cos  ⁡  α  =  1.2 then  (  sin  ⁡  α  +  cos  ⁡  α      )    2    =      sin    2    ⁡  α  +  2  sin  ⁡  α  cos  ⁡  α  +      cos    2    ⁡  α  =  1  +  2  sin  ⁡  α  cos  ⁡  α  =  1.44.

If sin ⁡ α + cos ⁡ α<!-- α

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