Find the exact value of ${sin}^{- 1} (- \frac{1}{2}) - {tan}^{- 1} (\frac{3}{4})$ $sin^-1 (-1/2)-tan^-1(3/4)$ ?

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Answer 1 · 2018-08-09T17:29:42

$- 66.87 d e g$ $- 66.87 deg$

The $30 d e g$ $30 deg$ is the arcsin of 1/2 and so, is $- 30 d e g$ $- 30 deg$ is the arcsin of -1/2

The "Pitagorian triangle (3, 4, 5)" is the one of tan 3/4 and so the arctan is $36.87 d e g$ $36.87 deg$

The angle you are looking for is $- 66.87 d e g$ $- 66.87 deg$ , the sum of $- 30 d e g$ $- 30 deg$ - $36.87 d e g$ $36.87 deg$

Find the exact value of sin−1(−12)−tan−1(34)sin^-1 (-1/2)-tan^-1(3/4)?