Question

(Sin² 30°-cos30°)-(sin60+cos60)=?​

Answer 1

Answer:

Answer

Use  sin(90∘−θ)=cosθ and  cos(90∘−θ)=sinθ

and  cos2θ+sin2θ=1

Now,

sin30∘⋅cos60∘+cos30∘⋅sin60∘

=sin(90∘−60∘)⋅cos60∘+cos(90∘−60∘)⋅sin60∘

=cos60∘⋅cos60∘+sin60∘⋅sin60∘

=cos260°+sin260°=1

Answer 2

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bro pls tell ans for this Q.An integer between -4 and -2 is _______

a) -4 b) -3 c) -2 d) 0

pl