sin(sec−1(−2.6)) = (Hint: 13÷5=2.6) sec−1(sec(330°)) = cos5A−cosA/sin5a−sinA =

Answer 1

secant = 1/cosine = 13/5

so cosine = 5/13

and sine = 12/13

it's a 5-12-13 right triangle

5 squared plus 12 squared = 13 squared

25+144= 169

sine of the angle whose secant = 2.6 is 12/13

2nd part:

inverse secant of secant of 330 degrees is 330 degrees

the inverse just sends you back to where you started.

the inverse of the original just sends you back to 330

3rd part:

soon to come