Without a calculator
sec 27° csc 63° - tan 27° cot 63º.

0.999999999999997995117350573559

Step-by-step explanation:

Evaluate trigonometric functions in the problem

1.12232623763436⋅1.12232623763436−0.509525449494429⋅0.509525449494429

Multiply 1.12232623763436 and 1.12232623763436 to get 1.2596161836824979128090526096.

1.2596161836824979128090526096−0.509525449494429×0.509525449494429≈1

Multiply 0.509525449494429 and 0.509525449494429 to get 0.259616183682499917691702036041.

1.2596161836824979128090526096−0.259616183682499917691702036041≈1

Subtract 0.259616183682499917691702036041 from 1.2596161836824979128090526096 to get 0.999999999999997995117350573559.

0.999999999999997995117350573559

answer: are you

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.