Snap & Solve (Mathematics - Science)

math

 
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math
by 1M2S04a AFFIQ NAQIYUDIN BIN OTHMAN PST - Modul II - Sunday, 8 October 2017, 11:06 PM
 

mcmane nk buat no 5?


Picture of Noorfirdaus bin Ab Ghani Pensyarah Matematik
Re: math
by Noorfirdaus bin Ab Ghani Pensyarah Matematik - Monday, 9 October 2017, 1:54 PM
 

Use factor formula

Picture of 1M1S01a NUR AIN BINTI ZAKARIA PST - Modul I
Re: math
by 1M1S01a NUR AIN BINTI ZAKARIA PST - Modul I - Friday, 9 February 2018, 6:40 PM
 

a) use formula 

1/2 ( sin (A+B) + sin (A-B) )

= 1/2 ( sin (2x + x ) + sin (2x - x) )

= 1/2 ( sin (3x) + sin (x) )

b) 1/2 ( cos  (A+B) + cos (A-B) )

= 1/2 ( cos (5x) + cos (-3x) )

When cos (-x)= cos (x)

Thus , = 1/2 ( cos (5x) + cos (3x) )

C) -1/2 ( cos(A+B) - cos (A-B) )

= -2× -1/2 ( cos (4x ) - cos (2x) )

= - ( cos  (4x ) + cos (2x) )