Question

1 Define binary operation
2 Find the principal value of cos-1 [-1 / 2]
3 Define a scalar matrix.
4 If y = sin (x2 + 5) then find dy / dx

Needed answer of all the questions.

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

1.

a binary operation or dyadic operation is a calculation that combines two elements (called operands) to produce another element. 

2.

Let y = cos−1 (−1/2) cos y = −1/2 cos y = cos (2π/3).