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what sign has sinA-cosA if A=1)215 2)-475 askiitians module compoun angles of trigo phase 1

what sign has sinA-cosA if A=1)215
2)-475
askiitians module compoun angles of trigo phase 1

Grade:9

2 Answers

Ajay
209 Points
4 years ago
Let A = 215
Sin 215 – Cos 215 
= SIn (180 + 35) – Cos (180 + 35)
= -Sin 35 + Cos 35
= Cos 35 – Sin 35
 
Since 35 is less than 45 
Cos 35 > SIn 35
Hence Cos 35-Sin 35 > 0
so the sign is positive.
SImilarly find for other value
raj
384 Points
4 years ago
 
hello,
Let A = 215
Sin 215 – Cos 215 
= SIn (180 + 35) – Cos (180 + 35)
= -Sin 35 + Cos 35
= Cos 35 – Sin 35

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