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In right angled sporof LQ = 901reandcos o = 331find sin o ten o, sinoand cos ² |
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Answer» In △ABC, ∠B=90 o , tanA= 3
1 = AB BC
Let BC =1x,AB= 3 AC 2 =AB 2 +BC 2
AC 2 =( 3 x) 2 +(x) 2 =4x 2
AC=2x (i) sinAcosC+cosAsinC= 2 1 × 2 1 + 2 3
× 2 3
= 4 1 + 4 3 =1 (II) cosAcosC−sinAsinC= 2 3
× 2 1 − 2 1 × 2 3
= 4 3
− 4 3
=0In △ABC, ∠B=90 o , tanA= 3
1 = AB BC
Let BC =1x,AB= 3 x AC 2 =AB 2 +BC 2
AC 2 =( 3 x) 2 +(x) 2 =4x 2
AC=2x (i) sinAcosC+cosAsinC= 2 1 × 2 1 + 2 3
× 2 3
= 4 1 + 4 3 =1 (ii) cosAcosC−sinAsinC= 2 3
× 2 1 − 2 1 × 2 3
= 4 3
− 4 3
=0In △ABC, ∠B=90 o , tanA= 3
1 = AB BC
Let BC =1x,AB= 3 x AC 2 =AB 2 +BC 2
AC 2 =( 3 x) 2 +(x) 2 =4x 2
AC=2x (i) sinAcosC+cosAsinC= 2 1 × 2 1 + 2 3
× 2 3
= 4 1 + 4 3 =1 (ii) cosAcosC−sinAsinC= 2 3
× 2 1 − 2 1 × 2 3
= 4 3
− 4 3
=0 mark me as the brainliest Step-by-step explanation: |
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