Math, asked by mohamedkhizar27, 9 months ago

find the value of sin (90-A) cosa+Sina cos(90-A)

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Answered by sonisiddharth751

2

Answer:

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Answered by sathish24499k

0

Answer:

sin(90-A)=cosA

Cos(90-A)=sinA

Therefore. lhs=cosAcos a+sin aSinA

=cos(A-a)

Since cos(a+b)=cos a cos b+sin a sin b

Step-by-step explanation:

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