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??? ? + ??? ? = …

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??? ? + ??? ? = 1, ? = 30° and B is an acute angle, then find the value of B

Posted by Piyush Gupta 4 years, 7 months ago

CBSE > Class 10 > Mathematics

4 answers

Karan Pandit 4 years, 7 months ago

SinA+cosB=1 Sin30+cosB =1 1/2+cosB=1 CosB=1-1/2 CosB=2-1/2 CosB=1/2 CosB= cos60 B=60 Ans

Piyush Gupta 4 years, 7 months ago

Sina + Cosb =1 Sin30 +cosb = 1 1/2+cosb=1 Cosb =1-1/2 Cosb=1/2 We know that cos60 = 1/2 =}B= 60

Nikita Godwal 4 years, 7 months ago

Sin30° + cos 60° = 1 (Sin 30° = 1/2 And cos 60° also 1/2) 1/2+1/2=2/2 that is 1

Nikita Godwal 4 years, 7 months ago

B= 60°

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