Exact Trig Values Without Calculator. Since 75 is the same as 30 + 45, and since 30° and 45° are both special angles for which we have already memorized the sine and cosine values, we can readily find the answer using another common identity Of course you could come up with one for degrees as well.
Easy Trick To Find Exact Values For Sin Cos Tan Youtube from i.ytimg.com Find exact values of trig functions how to use the unit circle to find exact values of trigonometric functions? Since 75 is the same as 30 + 45, and since 30° and 45° are both special angles for which we have already memorized the sine and cosine values, we can readily find the answer using another common identity You need to know all of the following, without the assistance of a calculator.
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Note that you have to use radians for this exact formula to work; Now if you have a question like sin120, then you have to add the ratios of sin45 and sin45 and sin30 to give sin120, this will give you a positive answer, but thins might not be right as it will might be negative from the image. Since 75 is the same as 30 + 45, and since 30° and 45° are both special angles for which we have already memorized the sine and cosine values, we can readily find the answer using another common identity How do you use inverse trig functions to find angles?
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