BY: MARIAH & JON 13.4 INVERSE OF SINE AND TANGENT

INVERSE SINE Say that the sine of theta equals A. To find the inverse sine you would put that sine to the -1 of whatever A equals would then equal theta. A can not be less than -1 or greater than 1.

EXAMPLE A now equals -1. Inverse the equation so sine of theta now equals A or now -1. Look at your chart if it’s a special angle! If so find what degree the sine of 1 equals. Since A is negative, theta will also be negative. Also once you find the angle convert it to radians as well. If its not a special angle use your calculator.

LET’S PRACTICE

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INVERSE TANGENT Inverse tangent works the same as inverse sine. Say that the tangent of theta equals A. The inverse tangent of A would then equal theta A can be anything because it ranges from negative infinity to positive infinity. Your answer, or theta, is the same ranges for inverse sine.

EXAMPLE A now equals the square root of 3 over 3. Inverse the equation so the tan of theta now equals A, or now the square root of 3 over 3. Again look at your chart to see if it’s a special angle! Put your answer in degrees and radians and don’t forget to see if it’s negative. If not special use a calculator!

LET’S PRACTICE

ANSWER