[Trignometry] help

[u/pixelpixen]

[u/Alkalannar]

Change everything into terms of sin(a) and cos(a)

What do you get and how can you simplify?

[u/XChampX-007]

Since the options do not depend on the value of alpha, plugging alpha = pi/4 should be enough to give the solution.

[u/eraco]

Anytime I see TRIG - 1 (or A +/-B), I try thinking about conjugates or difference of squares.

If you multiply the first rational to get sec² - 1 in numerator and the second rational to get sin² - 1, two things will happen.

1) Pythagorean identities can be applied

2) Common denominators.

The pythagoreans will result in reciprocal identities leading to 1 and -1

Because of the common denominators you’ll be able to combine the rational expressions and get 0 over the common denominators.

[u/nada-i]

dmn bru what kinda hw is this the answer is 0 tho light work no reaction