SIN 15{}^\circ +\COS 105{}^\circ \] \[\sin 15{}^\circ +\cos (90{}^\circ +15{}^\circ )=\sin 15{}^\circ -\sin 15{}^\circ =0\].

"> SIN 15{}^\circ +\COS 105{}^\circ \] \[\sin 15{}^\circ +\cos (90{}^\circ +15{}^\circ )=\sin 15{}^\circ -\sin 15{}^\circ =0\].

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\[\sin 15{}^\circ +\cos 105{}^\circ =\]    [MP PET 1992]

Mathematics Trigonometric Identities in Mathematics 1 year ago

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\[\SIN 15{}^\circ +\COS 105{}^\circ \] \[\sin 15{}^\circ +\cos (90{}^\circ +15{}^\circ )=\sin 15{}^\circ -\sin 15{}^\circ =0\].

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