Question
If cos(90Ā° ā Īø) = 3/5 for an acute angle Īø, find:
Solution
cos(90Ā° ā Īø) = sinĪø So sinĪø = 3/5 Then cosĪø = ā(1 ā sinĀ²Īø) = ā(1 ā 9/25) = ā(16/25) = 4/5 tanĪø = sinĪø / cosĪø = (3/5)/(4/5) = 3/4.
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