Question

If sin 2theta=cos(theta-36deg),theta and theta-26deg are acute angles,then find the value of theta.
Note:2 is not the power,it is sin 2theta.
Deg means degrees.

Answer 1

HEY FRIEND

HERE IS YOUR ANSWER

sin2@=cos(@-36°)

[USING cosA=sin(90-A) ]

sin2@=sin(90-(@-36))

2@=90-@+36

2@+@=126

3@=126

@=126/3

@=42°

HOPE THIS HELPS YOU

Answer 2

Hii friend.....★★★★★
there is your answer
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Given that
sin 2ø=cos (ø-36°)
here putting
cos A=sin(90-A)
so, sin2ø=sin [90-(ø-36°)]
=》2ø=90-ø+36
=》2ø+ø=126
=》3ø=126
=》ø=42°

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