Math, asked by sumbulyasmin555, 9 months ago

cos 3x = sin (3x- 36) . OPTION 1) 21 , 2) 31 ,3) 41, 4) 51 ..

Answers

Answered by swapnil567

0

Answer:

1) 21

$\cos(3x) = \sin(\pi \div 2 - 3x)$

Step-by-step explanation:

sin(π÷2 - 3x) = sin(3x-36)
cut sin on both sides
90-3x = 3x - 36
126 = 6x
x = 21

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