what is the value of (cos²67°-sin²23°)
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2
the value of this equation would be zero.
prashantkumaryadav:
no
okkk
ya
cos is the complement of sin
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4
{cos^2 67°- sin^2 (90°-67°)}
(cos²67°-cos²67°)
=0
(cos²67°-cos²67°)
=0
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