Answer:
D: (5 * 3)^3
D: 125 x 27
Step-by-step explanation:
<h3>
<u>Answer </u><u>:</u><u>-</u></h3>
( 1 - cos²x ) secx
=> sin²x . secx
Here the rule ( rule 1 ) is the first trigonometric identity [ sin²A + cos²A = 1 ] by simplifying we have , [ 1 - cos²A = sin² ] . So here we substituted 1 - cos²x = sin²x .
=> sin²x [ 1/cosx ]
Here the rule ( rule 2 ) is secx = 1/cosx . So here we substituted secx = 1/cosx .
=> sinx [ sinx/cosx ]
Here the rule ( rule 3 ) is sin²x can be written as sinx . sinx , so we get sinx . sinx [ 1/cosx ] next by simplifying , sinx [ sinx/cosx ].
=> sinx tanx
Here the rule ( rule 4 ) is , in the above we got sinx/cosx and here we know that , sinx/cosx = tanx . So we have tan x .
(-3)-(-6)×(-9)
Simplify your equation to make it look neater.
(-3)+(6)×(-9)
Combine like terms.
(-3+6)×(-9)
Simplify.
(3)×(-9)
Simplify. Remember, a negative times a positive is ALWAYS a negative.
-27
~Hope I helped!~
