Ingat sifat sudut berelasi pada kuadran I dan III,

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell tan space left parenthesis 180 degree plus straight A right parenthesis sin space left parenthesis 90 degree minus straight A right parenthesis sec space left parenthesis 90 degree minus straight A right parenthesis end cell equals cell tan space straight A times cos space straight A times csc space straight A end cell row blank equals cell fraction numerator sin space straight A over denominator cos space straight A end fraction times cos space straight A times fraction numerator 1 over denominator sin space straight A end fraction end cell row blank equals 1 end table end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«mrow»«mi»tan«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»180«/mn»«mo»§#176;«/mo»«mo»+«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»)«/mo»«mi»sin«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»90«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»)«/mo»«mi»sec«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»90«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»)«/mo»«/mrow»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mi»tan«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»§#183;«/mo»«mi»cos«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»§#183;«/mo»«mi»csc«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«mrow»«mi»sin«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«/mrow»«mrow»«mi»cos«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«/mrow»«/mfrac»«mo»§#183;«/mo»«mi»cos«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»§#183;«/mo»«mfrac»«mn»1«/mn»«mrow»«mi»sin«/mi»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»A«/mi»«/mrow»«/mfrac»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»1«/mn»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" role="math" 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style="max-width: none;" />

Jadi, diperoleh bentuk sederhananya adalah 1.

Nyatakan dalam bentuk yang sederhana.

a. <img align="middle" alt="begin mathsize 14px style tan space left parenthesis 180 degree plus A right parenthesis sin space left parenthesis 90 degree minus A right parenthesis s e c space left parenthesis 90 degree minus A right parenthesis end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi»tan«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»180«/mn»«mo»§#176;«/mo»«mo»+«/mo»«mi»A«/mi»«mo»)«/mo»«mi»sin«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»90«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mi»A«/mi»«mo»)«/mo»«mi»s«/mi»«mi»e«/mi»«mi»c«/mi»«mo»§#160;«/mo»«mo»(«/mo»«mn»90«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mi»A«/mi»«mo»)«/mo»«/mrow»«/mstyle»«/math»" role="math" src="data:image/png;base64,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" style="max-width: none;" />

matematika

bahasa indonesia

ipa terpadu

fisika

biologi

bahasa inggris

geografi

sosiologi

sejarah

kimia

ekonomi

Nyatakan dalam bentuk yang sederhana. a.

Jawaban: