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Natali5045456 [20]
2 years ago
8

Prove Sin(90-A)=cosA

Mathematics
2 answers:
Nikitich [7]2 years ago
8 0

Step-by-step explanation:

sin(90-A) = sin90cosA-sinAcos90

= cosA*1-0*sinA

= cos90

hence proved

Colt1911 [192]2 years ago
6 0

Step-by-step explanation:

sin(90-A)=cosA

sin(90-A)=sin(90-A)

90-A=90-A

-A+A=90-90

=0

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