Let t = theta for short (1) If cos(t) = 0.2, find the value of: cos(t) + cos(t + 2pi) + cos(t + 4pi) (2) If cot(t) = -2, find the value of: cot(t) + cot(t - pi) + cot(t - 2pi)
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Hi magentarita, Note that and that
Hello, magentarita! Another approach . . . (1) If , find the value of: . Identity: . We have: . . . . . . . . . . . . . . . . . . . (2) If , find the value of: . Identity: . We have: . . . . . . . . . . . . . . . . . . . . . . . . .
Ooops.... I misread cot for cos on question 2, thank you Soroban.
I thank both of you, especially Soroban.