core 3 maths
Hi, i'm stuck on some trigonometry questions...
solve for x:
a) 3sin2xsecx=5 for 0<x<90
b)9cosx-12sinx=5 for 0<x<360
solve for x:
a) 3sin2xsecx=5 for 0<x<90
b)9cosx-12sinx=5 for 0<x<360
For (a), use .
For (b), rewrite the LHS as
For (b), rewrite the LHS as
Original post by BobbJo
For (a), use .
For (b), rewrite the LHS as
For (b), rewrite the LHS as
thank you so much!
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