Answer:
see image.
Step-by-step explanation:
For the pairs sec&csc,
tan&cot,
sin&cos
the ratios are equal IF the angles are complementary.
So like, EXAMPLE:
sin 20° = cos 70°
tan 10° = cot 80° or
sec 50° = csc 40°
^^^^these are not the answers! Just see the angles add up to 90°
So you just need to grab the angle info in the parenthesis and ADD it up and set it EQUAL TO 90°
and SOLVE for theta. See image.
