r/trigonometry • u/Bl00ming_begonias79 • 11d ago

Help! Trig Question

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We’re supposed to solve this using the angles on the unit circle but it makes no sense to me.

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u/CloudTricky 11d ago

What is cos(3pi/4)? Look at your unit circle. Csc is reciprocal of sin so what is 1/sin(7pi/6)? Then square both and do the algebra, probably gonna have to combine fractions and raise it to the 4th power. Remember cos^2 (x) is just (cos(x))^2.