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Almost asinus.   You are right with cos and tan, but sin(150°) = sin(30°)   (sin is positive in the second quadrant).

Hello guest!

Express the following in terms of the sine, cosine or tangent of an acute angle.

sin150°

cos220°

tan325 °

sin150°   = sin (- 30°)

cos220°  = - cos 40°

tan325 °  = tan (- 35°)

Greeting asinus :- )

 !