Дано: sinα = 3/5 ; π/2 <α <π найти значение: cosα - tgα

Question

Дано: sinα = 3/5 ; π/2 <α <π<br> найти значение: cosα - tgα

Answer 1

I hope this helps you

sina=height / hypothenus


height ²+base²=hypothenus²


3²+base²=5²


base=4


cosa=base/hypothenus (cos and tg are negative in second area)


tga=height /base


cosa=-4/5


tga=-3/4


-4/5-(-3/4)


-16/20+15/20


-1/20

Comments

спасибо

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