cos27+sin27/cos27-sin27=tan72
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Answer:
L.H.S=
cos27
o
−sin27
cos27
o
+sin27
=
1−
cos27
sin27
1+
cos27
sin27
=
1−tan27
o
1+tan27
o
=
1−tan45
o
×tan27
o
tan45
o
+tan27
o
=(tan45
o
+27
o
)
=tan72
o
=R.H.S(proved).
please follow m
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