sin30 degree × cos60 degree + cos30 degree × sin60 degree = 1
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=sin (90○-60○)*cos60○+cos (90○-60○)*sin60○
=cos 60°*cos60°+sin60°*sin60°
=cos^60°+sin^60°
= 1
=cos 60°*cos60°+sin60°*sin60°
=cos^60°+sin^60°
= 1
shambhavi7th:
thank u for your help
there is a sq on both the sin and cos in the second last step.ok
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