Question

In triangle,cos(P+R)=0.what is angle Q equal to​

Answer 1

cos(p+r)=0
cos(p+r)=cos90
therefore p+r=90
therefore angle q=90

correct option is D

Answer 2

Cos (P +R) = 0.

cos (P+ R) = cos 90

P+R = 90. . eqn 1

In triangle PQR,

By angle sum property,

P + Q + R = 180°

Q = 180 - 90. .(from eqn 1)

Q = 90°

hence correct option is (D) 90°.

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