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Question
secondary 4 | A Maths
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please help w this trigo qn!
Date Posted: 6 years ago
Views: 237
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done
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clear
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QED
Date Posted:
6 years ago
may i know how you got from the third to the fourth step?
Factorise out 1/cos x from 1/cos x - cos x to get (1/cos x)(1 - cos^2 x)
Since there was no cos in the answer, i thought that cos^2 x should have to appear somewhere so that it could be converted to sin :)
ohhhhhhhh okay understand! thank you so much!
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