Please solve these sums for me ... Frm 1 to 13
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7. lhs:
=(1+sec x)/secx
= (1/secx) + (secx/secx)
= Cosx+1
Multiply 1-cosx up n down
= (1+cosx)(1-cosx)/(1-cosx)
= (1-cos^2 x)/1-cosx
=sin^2 x/ 1- cosx
= Rhs
=(1+sec x)/secx
= (1/secx) + (secx/secx)
= Cosx+1
Multiply 1-cosx up n down
= (1+cosx)(1-cosx)/(1-cosx)
= (1-cos^2 x)/1-cosx
=sin^2 x/ 1- cosx
= Rhs
:)
In the 9th one, do u notice that 42+48=90
Similarly 54+36=90?
So, u gotta group em together ...il do one fo u:
tan 42 tan 48 = tan42 cot(90-48)= tan 42 cot 42 = 1
Btw.....u hav ANY doubts, ask me...
iam gonna do it now if any doubts i ll ask u
n really thank very much
:)
i need u r help please chek my new question can u solve it
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