EVALUATING INVERSE TRIG EXPRESSIONS DR. SHILDNECK.

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Presentation transcript:

EVALUATING INVERSE TRIG EXPRESSIONS DR. SHILDNECK

THINGS YOU MUST REMEMBER! THIS MEANS THAT THE ONLY ANSWERS YOU CAN GET ARE IN THOSE RANGES!!!

FINDING THE VALUES OF INVERSE TRIG EXPRESSIONS 1. ASK YOURSELF THE BACKWARDS QUESTION: “ WHERE ON THE UNIT CIRCLE IS THE (SIN/COS/TAN) EQUAL TO THIS VALUE?” 2. WHICH OF THESE VALUES THAT YOU CAME UP WITH FIT IN THE RANGE OF THE ARC-FUNCTION? USUALLY, THERE ARE TWO PLACES ON THE UNIT CIRCLE WHERE THAT VALUE OCCURS FOR THAT SPECIFIC TRIG FUNCTION. 3. NOW… WHAT IS THE ANSWER?

EXAMPLES

Evaluate each function. Use radians for your answers when appropriate.

(HINT: For tangent, think about the fact that it is sine over cosine.)

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