p198 q14 reex9 don't know how to do b ii and iii . thanks
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Originally Posted by afeasfaerw23231233 p198 q14 reex9 don't know how to do b ii and iii . thanks While I think about b ii .... b iii. If then one of , or has to equal zero. Therefore one of A, B or C has to equal 90 degrees.
after thinking this question for thirty min. i finally know how to do b ii and iii. thanks anyway
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