cos (3pyeby2+x)cos(2pye +x)(cot (3 pye by 2-x))=1
Answers
Answered by
0
Step-by-step explanation:
L.H.S.=cos(
2
3π
+x)cos(2π+x)[cot(
2
3π
−x)+cot(2π+x)]
=sinxcosx[tanx+cotx]
=sinxcosx(
cosx
sinx
+
sinx
cosx
)
=(sinxcosx)[
sinxcosx
sin
2
x+cos
2
x
]
=1=R.H.S.
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SIMILAR QUESTIONS
star-struck
cos(
4
π
+x)+cos(
4
π
−x)=
2
cosx
Medium
View solution
>
cos
2
A
+cos
2
B
+cos
2
C
=4cos(
4
π−A
)cos(
4
π−B
)(
4
π−C
)
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