Printable View

how do we find all solutions in that interval given. thanks

Quote: Originally Posted by jvignacio how do we find all solutions in that interval given. thanks Hello JV, Cosine is negative in QII and QIII. Reference angle in QII = 180 - 60 = 120 degrees or radians Reference angle in QIII = 180 + 60 = 240 degrees or radians In radians: over the interval In degrees: over the interval