how do i find the cosec one ? - Ask.ManyTutors

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secondary 3 | E Maths
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secondary 3 E Maths Singapore

how do i find the cosec one ?

Date Posted: 5 years ago

Views: 331

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Hope this helps

Date Posted: 5 years ago

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mint

Mint

5 years ago

hi thanks for your solution , may i ask why is sin(90-a) = cos (a) ? thanks !

Justin Ng

5 years ago

Hi! That’s because it’s a trigonometric identity where sin (90-x) = cos (x). I’ll attach a picture of the proof

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done {{ upvoteCount }} Upvotes

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Here’s the proof!

Date Posted: 5 years ago

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mint

Mint

5 years ago

ohh got it, thanks a lot ! :)