If triangle ABC is a right triangle AB is 27, BC is 36, and AC is 45, which of the following can be used to find the measure of angle A? Select all that apply.

sinA= 36/45, cosA= 27/45, tanA= 27/36

Step-by-step explanation:

Remember Soh Cah Toa and find the right values for opposite, adjacent, and hypotenus

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places